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Field Descriptions
16 matching records found.
Label Query: Genus = "Egeria", Species = "densa"
Hydrocharitaceae
1. Egeria densa Planch.
U.S.A., Washington, Jefferson County:
Leland Lake. West end of lake, near outlet.
T28N R2W S26. Datum: NAD 27. Coordinate uncertainty: 805 meters. Georeferenced by Ben Legler. Coordinate Source: TRS2LL.
1 meter deep, with Potamogeton robbinsii, in organic mud. Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. Origin: Introduced.
WTU 333641
J. Parsons s.n.    24 May 1994
1. Egeria densa Planch.
Database ID
19865 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
333641 
Barcode
 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.  
Type Notes
 
Collector
J. Parsons 
Collection #
s.n. 
Other Collectors
 
Date Collected
24 May 1994 
Verbatim Date
 
Country
U.S.A. 
State or Province
Washington 
County
Jefferson 
Locality
Leland Lake. West end of lake, near outlet. 
Elevation
 
Coordinates
T28N R2W S26 
Site Description
1 meter deep, with Potamogeton robbinsii, in organic mud. 
Specimen Notes
Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. 
Phenology
 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
2. Egeria densa Planch.
U.S.A., Washington, Pacific County:
Ilwaco, shoreline of Black Lake, Route 101.
T10N R11W S33 NE. Datum: NAD 27. Coordinate uncertainty: 805 meters. Georeferenced by Ben Legler. Coordinate Source: TRS2LL.
With Utricularia vulgaris. Aquatic weed, white flowers, dominant. Origin: Introduced.
WTU 339231
P. F. Zika 14160    31 Aug 1999
2. Egeria densa Planch.
Database ID
19866 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
339231 
Barcode
 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.  
Type Notes
 
Collector
P. F. Zika 
Collection #
14160 
Other Collectors
 
Date Collected
31 Aug 1999 
Verbatim Date
 
Country
U.S.A. 
State or Province
Washington 
County
Pacific 
Locality
Ilwaco, shoreline of Black Lake, Route 101. 
Elevation
 
Coordinates
T10N R11W S33 NE 
Site Description
With Utricularia vulgaris. 
Specimen Notes
Aquatic weed, white flowers, dominant. 
Phenology
 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
3. Egeria densa Planch.
U.S.A., Washington, San Juan County:
Near pond on Turn Point, east shore of San Juan Island.
Elev. 26 ft. T35N R2W S18. Datum: WGS 84. Coordinate uncertainty: 10000 meters. Georeferenced by WTU Staff. Coordinate Source: GeoLocate.
Steep roadbank, partial shade, with Symphoricarpos. Rhizomatous aquatic weed, with Hippuris vulgaris.¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. Origin: Introduced.
WTU 342085
P. F. Zika 14642    24 Oct 1999
3. Egeria densa Planch.
Database ID
19867 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
342085 
Barcode
 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.  
Type Notes
 
Collector
P. F. Zika 
Collection #
14642 
Other Collectors
 
Date Collected
24 Oct 1999 
Verbatim Date
 
Country
U.S.A. 
State or Province
Washington 
County
San Juan 
Locality
Near pond on Turn Point, east shore of San Juan Island. 
Elevation
26 ft. 
Coordinates
T35N R2W S18 
Site Description
Steep roadbank, partial shade, with Symphoricarpos. 
Specimen Notes
Rhizomatous aquatic weed, with Hippuris vulgaris.¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. 
Phenology
 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
4. Egeria densa Planch.
U.S.A., Oregon, Lane County:
Miller's Arm, Siltcoos [sic: Siltcoose] Lake.
Flowers white, often above the surface, staminate only. Phenology: Vegetative. Origin: Introduced.
WTU 163111
A. N. Steward s.n.    29 Sep 1951
4. Egeria densa Planch.
Database ID
35036 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
163111 
Barcode
 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Elodea densa (Planch.) Casp.
    Annotated by A. N. Steward.
2. Egeria densa Planch.  
Type Notes
 
Collector
A. N. Steward 
Collection #
s.n. 
Other Collectors
 
Date Collected
29 Sep 1951 
Verbatim Date
 
Country
U.S.A. 
State or Province
Oregon 
County
Lane 
Locality
Miller's Arm, Siltcoos [sic: Siltcoose] Lake. 
Elevation
 
Coordinates
 
Site Description
 
Specimen Notes
Flowers white, often above the surface, staminate only. 
Phenology
Vegetative 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
5. Egeria densa Planch.
U.S.A., Washington, Skagit County:
South end of Big Lake, southeast of Mt. Vernon.
Elev. 85 ft. 48° 21' 52" N, 122° 12' 57" W. Datum: NAD 27.
Shallow water 1-3 meters deep with Nuphar polysepalum, Nymphaea odorata, abundant filamentous algae; bordered by Typha marsh. Leaves in whorls of 6 at stem ends, in whorls of 3-4 below; abundant in shallows, forming loose mats 1 meter below surface.¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. Phenology: Vegetative. Origin: Introduced.
WTU 382761
Ben Legler 2363    6 Sep 2004
5. Egeria densa Planch.
Database ID
111173 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
382761 
Barcode
 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.
    Annotated by Ben Legler, 2004.  
Type Notes
 
Collector
Ben Legler 
Collection #
2363 
Other Collectors
 
Date Collected
6 Sep 2004 
Verbatim Date
 
Country
U.S.A. 
State or Province
Washington 
County
Skagit 
Locality
South end of Big Lake, southeast of Mt. Vernon. 
Elevation
85 ft. 
Coordinates
48° 21' 52" N, 122° 12' 57" W 
Site Description
Shallow water 1-3 meters deep with Nuphar polysepalum, Nymphaea odorata, abundant filamentous algae; bordered by Typha marsh. 
Specimen Notes
Leaves in whorls of 6 at stem ends, in whorls of 3-4 below; abundant in shallows, forming loose mats 1 meter below surface.¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. 
Phenology
Vegetative 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
6. Egeria densa Planch.
U.S.A., Washington, Pacific County:
Ilwaco. North end of Black Lake, east side of Sand Ridge Road.
Elev. 16 ft. 46° 19.2' N, 124° 2.6' W; T10N R11W S28.
Damp mowed meadow, low ground. White flowers; abundant in lake. Tissue removed by Lauren Kuehne at the University of Washington for DNA analysis 4/18/2018. Phenology: Flowers. Origin: Introduced.
WTU 373946; Barcode: WTU-V-037860
Peter F. Zika 22279    30 Aug 2005
with David Giblin, Cathy Maxwell, Ben Legler
6. Egeria densa Planch.
Database ID
154914 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
373946 
Barcode
WTU-V-037860 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.
    Annotated by P. F. Zika, 2005. Sources: FNA.  
Type Notes
 
Collector
Peter F. Zika 
Collection #
22279 
Other Collectors
David Giblin, Cathy Maxwell, Ben Legler 
Date Collected
30 Aug 2005 
Verbatim Date
 
Country
U.S.A. 
State or Province
Washington 
County
Pacific 
Locality
Ilwaco. North end of Black Lake, east side of Sand Ridge Road. 
Elevation
16 ft. 
Coordinates
46° 19.2' N, 124° 2.6' W; T10N R11W S28 
Site Description
Damp mowed meadow, low ground. 
Specimen Notes
White flowers; abundant in lake. Tissue removed by Lauren Kuehne at the University of Washington for DNA analysis 4/18/2018.  
Phenology
Flowers 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
7. Egeria densa Planch.
U.S.A., Washington, Island County:
Lone Lake, Whidbey Island, Washington.
T29N R3E S5, 6, 7, & 8. Datum: NAD 27. Coordinate uncertainty: 805 meters. Georeferenced by Ben Legler. Coordinate Source: TRS2LL.
Main leaves averaging at least 2.5 (2-3.5) cm X 2-3 (5) mm, in whorls of mostly (4) 6; male spathes 2-3 flowered; petals or allowed to escape (Hitcock & Cronquist, 1973).¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. Phenology: Vegetative. Origin: Introduced.
WTU 364520
Susan Horton     6 Apr 2006
7. Egeria densa Planch.
Database ID
155936 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
364520 
Barcode
 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.  
Type Notes
 
Collector
Susan Horton 
Collection #
 
Other Collectors
 
Date Collected
6 Apr 2006 
Verbatim Date
 
Country
U.S.A. 
State or Province
Washington 
County
Island 
Locality
Lone Lake, Whidbey Island, Washington. 
Elevation
 
Coordinates
T29N R3E S5, 6, 7, & 8 
Site Description
 
Specimen Notes
Main leaves averaging at least 2.5 (2-3.5) cm X 2-3 (5) mm, in whorls of mostly (4) 6; male spathes 2-3 flowered; petals or allowed to escape (Hitcock & Cronquist, 1973).¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. 
Phenology
Vegetative 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
8. Egeria densa Planch.
U.S.A., Oregon, Lincoln County:
Southwest end of Devils Lake, near Inlet of Rock Creek, Lincoln City.
Elev. 65 ft. T7S R11W S14. Datum: NAD 27. Coordinate uncertainty: 805 meters. Georeferenced by Ben Legler. Coordinate Source: TRS2LL.
Aquatic with Isoetes, Utricularia vulgaris. Phenology: Vegetative. Origin: Introduced.
WTU 371500
P. F. Zika 11841    8 Aug 1992
8. Egeria densa Planch.
Database ID
169692 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
371500 
Barcode
 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.  
Type Notes
 
Collector
P. F. Zika 
Collection #
11841 
Other Collectors
 
Date Collected
8 Aug 1992 
Verbatim Date
 
Country
U.S.A. 
State or Province
Oregon 
County
Lincoln 
Locality
Southwest end of Devils Lake, near Inlet of Rock Creek, Lincoln City. 
Elevation
65 ft. 
Coordinates
T7S R11W S14 
Site Description
Aquatic with Isoetes, Utricularia vulgaris. 
Specimen Notes
 
Phenology
Vegetative 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
9. Egeria densa Planch.
U.S.A., Oregon, Benton County:
Willamette Valley, Harkens Lake, a cut-off meander of the Willamette River, 3 air miles northeast of Monroe.
Elev. 275 ft. UTM Zone 10, 479551E, 4910348N. Datum: WGS 84.
Submersed in 30 centimeters of water, most flowers at surface. With Potamogeton crispus, Wolffia, Cornus sericea. Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. Phenology: Fertile. Origin: Introduced.
WTU 396706
Nick Otting 3447    29 Jul 2012
with Dick Brainerd
9. Egeria densa Planch.
Database ID
190246 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
396706 
Barcode
 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.  
Type Notes
 
Collector
Nick Otting 
Collection #
3447 
Other Collectors
Dick Brainerd 
Date Collected
29 Jul 2012 
Verbatim Date
 
Country
U.S.A. 
State or Province
Oregon 
County
Benton 
Locality
Willamette Valley, Harkens Lake, a cut-off meander of the Willamette River, 3 air miles northeast of Monroe. 
Elevation
275 ft. 
Coordinates
UTM Zone 10, 479551E, 4910348N 
Site Description
Submersed in 30 centimeters of water, most flowers at surface. With Potamogeton crispus, Wolffia, Cornus sericea. 
Specimen Notes
Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. 
Phenology
Fertile 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
10. Egeria densa Planch.
U.S.A., Washington, King County:
At dock on shoreline of Lake Washington at north end of Magnuson Park.
Elev. 5 m. 47.689241° N, 122.264544° W. Datum: WGS 84. Coordinate uncertainty: 4 meters. Georeferenced by Ben Legler. Coordinate Source: GPS.
Shallow water on lake edge, sheltered by dock, with Vallisneria americana, Potamogeton spp., Myriophyllum. Leaves in whorls of 5-6, margins serrulate; stem fragments floating in shallow water; scattered.¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. Phenology: Vegetative.
WTU 418935; Barcode: WTU-V-041992
Ben Legler 14326    24 Aug 2016
with Peter F. Zika
10. Egeria densa Planch.
Database ID
2814766 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
418935 
Barcode
WTU-V-041992 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.
    Annotated by Ben Legler, 2016.  
Type Notes
 
Collector
Ben Legler 
Collection #
14326 
Other Collectors
Peter F. Zika 
Date Collected
24 Aug 2016 
Verbatim Date
 
Country
U.S.A. 
State or Province
Washington 
County
King 
Locality
At dock on shoreline of Lake Washington at north end of Magnuson Park. 
Elevation
5 m. 
Coordinates
47.689241° N, 122.264544° W 
Site Description
Shallow water on lake edge, sheltered by dock, with Vallisneria americana, Potamogeton spp., Myriophyllum. 
Specimen Notes
Leaves in whorls of 5-6, margins serrulate; stem fragments floating in shallow water; scattered.¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. 
Phenology
Vegetative 
Origin
 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
11. Egeria densa Planch.
U.S.A., Washington, King County:
Near mouth of Juanita Creek, Juanita Bay, Lake Washington, Juanita, Kirkland.
Elev. 5 m. 47.7041° N, 122.2178° W. Coordinate Source: Specimen Label.
Full sun, with Ceratophyllum demersum, Myriophyllum spicatum, Potamogeton richardsonii, P. praelongus, P. crispus, Elodea canadensis. Common submerged aquatic, leaves 3-5 millimeters wide, 4-6/node. Tissue removed by Lauren Kuehne at the University of Washington for DNA analysis 4/18/2018. Origin: Introduced.
WTU 409813; Barcode: WTU-V-023843
Peter F. Zika 28074    12 Jul 2016
11. Egeria densa Planch.
Database ID
3102924 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
409813 
Barcode
WTU-V-023843 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.  
Type Notes
 
Collector
Peter F. Zika 
Collection #
28074 
Other Collectors
 
Date Collected
12 Jul 2016 
Verbatim Date
 
Country
U.S.A. 
State or Province
Washington 
County
King 
Locality
Near mouth of Juanita Creek, Juanita Bay, Lake Washington, Juanita, Kirkland. 
Elevation
5 m. 
Coordinates
47.7041° N, 122.2178° W 
Site Description
Full sun, with Ceratophyllum demersum, Myriophyllum spicatum, Potamogeton richardsonii, P. praelongus, P. crispus, Elodea canadensis. 
Specimen Notes
Common submerged aquatic, leaves 3-5 millimeters wide, 4-6/node. Tissue removed by Lauren Kuehne at the University of Washington for DNA analysis 4/18/2018.  
Phenology
 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
12. Egeria densa Planch.
U.S.A., Oregon, Clatsop County:
Sloughs on both sides of Route 101, near West Anderson Road, 0.9 air kilometers southeast of Sunset Lake, Warrington.
Elev. 8 m. 46.0808° N, 123.916° W. Coordinate Source: Specimen Label.
Full sun to partial shade of shoreline thickets, with Iris pseudacorus, Nuphar, Nymphaea odorata, Cabomba, Typha latifolia. Showy white flowers, emergent aquatic, common.¶Tissue removed by Lauren Kuehne at the University of Washington for DNA analysis 4/18/2018. ¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. Phenology: Flowers. Origin: Introduced.
WTU 412136; Barcode: WTU-V-026589
Peter F. Zika 28266    14 Aug 2016
12. Egeria densa Planch.
Database ID
3141558 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
412136 
Barcode
WTU-V-026589 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.  
Type Notes
 
Collector
Peter F. Zika 
Collection #
28266 
Other Collectors
 
Date Collected
14 Aug 2016 
Verbatim Date
 
Country
U.S.A. 
State or Province
Oregon 
County
Clatsop 
Locality
Sloughs on both sides of Route 101, near West Anderson Road, 0.9 air kilometers southeast of Sunset Lake, Warrington. 
Elevation
8 m. 
Coordinates
46.0808° N, 123.916° W 
Site Description
Full sun to partial shade of shoreline thickets, with Iris pseudacorus, Nuphar, Nymphaea odorata, Cabomba, Typha latifolia. 
Specimen Notes
Showy white flowers, emergent aquatic, common.¶Tissue removed by Lauren Kuehne at the University of Washington for DNA analysis 4/18/2018. ¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. 
Phenology
Flowers 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
13. Egeria densa Planch.
U.S.A., Oregon, Lane County:
East end of Kirk Road, near Coyote Creek, just north of Fern Ridge dam.
Elev. 105 m. 44.1198° N, 123.2904° W. Coordinate Source: Specimen Label.
Full sun, with Myriophyllum spicatum, Potamogeton crispus, Elodea canadensis. Occasional submerged aquatic near shorelines.¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. Origin: Introduced.
WTU 416704; Barcode: WTU-V-036337
Peter F. Zika 28576    12 Oct 2016
with R.E.Brainerd, W. Messinger, Jason Spear
13. Egeria densa Planch.
Database ID
3188048 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
416704 
Barcode
WTU-V-036337 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.  
Type Notes
 
Collector
Peter F. Zika 
Collection #
28576 
Other Collectors
R.E.Brainerd, W. Messinger, Jason Spear 
Date Collected
12 Oct 2016 
Verbatim Date
 
Country
U.S.A. 
State or Province
Oregon 
County
Lane 
Locality
East end of Kirk Road, near Coyote Creek, just north of Fern Ridge dam. 
Elevation
105 m. 
Coordinates
44.1198° N, 123.2904° W 
Site Description
Full sun, with Myriophyllum spicatum, Potamogeton crispus, Elodea canadensis. 
Specimen Notes
Occasional submerged aquatic near shorelines.¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. 
Phenology
 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
14. Egeria densa Planch.
U.S.A., Washington, Pierce County:
JBLM, Artillary Impact Area, Mortar Point 3, Nisqually Lake vicinity.
Elev. 82 m. 47.02895° N, 122.62569° W. Datum: WGS 84. Coordinate Source: GPS.
Infrequent in shallow water.
WTU
Peter Dunwiddie PWD-16-256    24 Jun 2016
with Rod Gilbert, Sarah Krock, Peter Zika
14. Egeria densa Planch.
Database ID
3244980 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
 
Barcode
 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.
    Annotated by Peter Zika.  
Type Notes
 
Collector
Peter Dunwiddie 
Collection #
PWD-16-256 
Other Collectors
Rod Gilbert, Sarah Krock, Peter Zika 
Date Collected
24 Jun 2016 
Verbatim Date
 
Country
U.S.A. 
State or Province
Washington 
County
Pierce 
Locality
JBLM, Artillary Impact Area, Mortar Point 3, Nisqually Lake vicinity. 
Elevation
82 m. 
Coordinates
47.02895° N, 122.62569° W 
Site Description
Infrequent in shallow water. 
Specimen Notes
 
Phenology
 
Origin
 
Cultivated?
No 
Imaged?
No 

Hydrocharitaceae
15. Egeria densa Planch.
U.S.A., Washington, Clark County:
Fallen Leaf Lake Park, Shoreline just west of picnic area.
Elev. 65 m. 45.60018° N, 122.40859° W. Datum: WGS 84. Coordinate uncertainty: 50 meters. Coordinate Source: GPS.
Eutrophic pond with Impatiens capensis, Nuphar polysepala, and Juncus effusus common along shoreline. Locally common in shallow water; rhizomatous. ¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. Phenology: Vegetative. Origin: Native.
WTU 420154; Barcode: WTU-V-044228
David Giblin 6344    11 Sep 2018
15. Egeria densa Planch.
Database ID
3245968 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
420154 
Barcode
WTU-V-044228 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.
    Annotated by David Giblin, 2 2018. Sources: Flora PNW, 2nd.  
Type Notes
 
Collector
David Giblin 
Collection #
6344 
Other Collectors
 
Date Collected
11 Sep 2018 
Verbatim Date
 
Country
U.S.A. 
State or Province
Washington 
County
Clark 
Locality
Fallen Leaf Lake Park, Shoreline just west of picnic area.  
Elevation
65 m. 
Coordinates
45.60018° N, 122.40859° W 
Site Description
Eutrophic pond with Impatiens capensis, Nuphar polysepala, and Juncus effusus common along shoreline.  
Specimen Notes
Locally common in shallow water; rhizomatous. ¶Tissue removed by Dorothy Chase at the University of Washington for DNA analysis, December 2019. 
Phenology
Vegetative 
Origin
Native 
Cultivated?
No 
Imaged?
Yes 

Hydrocharitaceae
16. Egeria densa Planch.
U.S.A., Oregon, Linn County:
Slough at south end of Browers Rock State Park.
Elev. 180 ft. 44.6292° N, 122.1661° W. Datum: WGS 84. Coordinate uncertainty: 500 meters. Georeferenced by Dan Post. Coordinate Source: Digital Map.
Rooted, submerged in warm, slow-moving water of slough that is a backwater of the Willamette River, with Potamogeton zosteriformis, Ceratophyllum demersum, Ludwegia hexapeltala [Ludwigia hexapetala], Myriophyllum Phenology: Vegetative. Origin: Introduced.
WTU 424041; Barcode: WTU-V-065269
Barbara L. Wilson 17231    27 Jul 2012
with Richard Brainerd, Crystal Derbecq, Maya Goklany, Andy Niell
16. Egeria densa Planch.
Database ID
3463152 
Herbarium
WTU 
Collection
Vascular Plants 
Dataset
 
Accession
424041 
Barcode
WTU-V-065269 
Other Numbers
 
Family
Hydrocharitaceae 
Name on Specimen
Egeria densa Planch. 
Accepted Name
Egeria densa Planch. 
Annotation History
1. Egeria densa Planch.  
Type Notes
 
Collector
Barbara L. Wilson 
Collection #
17231 
Other Collectors
Richard Brainerd, Crystal Derbecq, Maya Goklany, Andy Niell 
Date Collected
27 Jul 2012 
Verbatim Date
 
Country
U.S.A. 
State or Province
Oregon 
County
Linn 
Locality
Slough at south end of Browers Rock State Park. 
Elevation
180 ft. 
Coordinates
44.6292° N, 122.1661° W 
Site Description
Rooted, submerged in warm, slow-moving water of slough that is a backwater of the Willamette River, with Potamogeton zosteriformis, Ceratophyllum demersum, Ludwegia hexapeltala [Ludwigia hexapetala], Myriophyllum 
Specimen Notes
 
Phenology
Vegetative 
Origin
Introduced 
Cultivated?
No 
Imaged?
Yes 

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Database Field Descriptions:
Database ID
Each of our backend databases assigns a unique and persistent integer ID to each specimen record. A GUID (globally unique identifier) can be formed from this by combining it with the herbarium and collection acronyms (example: WTU-VP-12733).
Herbarium
Every herbarium is referred to by a unique acronym. Ours is WTU, which stands for Washington Territorial University. Our database also includes some specimens housed at NOCA (North Cascades National Park Herbarium) and MORA (Mount Rainier National Park Herbarium). For a complete listing of herbarium acronyms, see Index Herbariorum.
Collection
WTU's specimens are physically housed in separate collections according to taxonomic groups: Vascular Plants, Bryophytes, Algae, Lichens, and Fungi.
Dataset
Some specimens are grouped into "Datasets," representing such things as incorporated herbaria or major collecting projects.
Accession
Each of WTU's Vascular Plant specimens is assigned an accession number. Our other collections lack accession numbers (see Barcode instead). Ideally, each specimen would have a unique accession number, but this fails in practice. Some accession numbers include "JWT" after the number; these indicate specimens originating from the herbarium of J. William Thompson that were integrated into WTU's collections but not re-accessioned with WTU numbers. Accession numbers followed by an "A", "B", or other single letter represent sheets with multiple collections mounted on them, all using the same accession number.
Barcode
Our Bryophyte, Algae, Lichen, Fungi, and some Vascular Plant specimens are assigned pre-printed barcode stickers. These follow the format "WTU-C-######", where C represents a code for the collection (one of: V, B, A, L, F) and ###### represents a zero-padded, six-digit number.
Other Numbers
Specimens collected from North Cascades and Mount Rainier National Parks are assigned National Park Service accession and catalog numbers. These numbers are listed here.
Family
The scientific name of the family. Our database generally uses AGPIII and other current sources for vascular plant family names. However, our physical Vascular Plant collection is organized by the older Englerian sequence.
Accepted Name
For Vascular Plants, this gives the accepted name by which the specimen is currently known. The accepted name is derived by looking up the most recent annotation name in a synonymy table and finding its corresponding accepted name.
Annotation History
The sequence of annotations and scientific names given on the physical specimen is listed here, in order from the first to most recent. We treat the name on the original label as the first annotation.
Type Notes
If this is a type specimen, then information about its type status (holotype, isotype, etc.) and the name(s) for which it is a type is provided here.
Collector
The person who collected this specimen, as given on the label, and whose name is associated with the collection number on the label. If no collector name is given, we enter "unknown" into this field.
Collection #
A unique number assigned to the specimen by the collector. Different collectors use different numbering schemes; these may include the addition of prefixes (such as their initials or the year) or suffixes (such as an A or B). In the database, any prefixes and suffixes are included in the Collector's Number field exactly as they appear on the specimen label. When no collector number is given, we type "s.n." in this field.
Other Collectors
Other collectors that are listed on the label along with the primary collector, but whose collection number was not assigned to this specimen.
Date Collected
The date on which the specimen was collected, split up between day, month, and year in the database. Months are stored as nubmers (1-12) but displayed as three-letter abbreviations. Years are alway 4-digits long. Occasionally the label may give a range of dates. In such cases, the first date in the range is used as the collection date, and the entire collection date is entered into the Verbatim Date field as it appears on the label. If no date is given, then the date fields are left blank and a note is made in the Verbatim Date field.
Verbatim Date
The literal date string as displayed on the label; only used for dates that cannot be represented by a single day, month, and year.
Country
Name of the country from which the specimen was collected. Specimens from the United States of America are entered as "U.S.A."
State or Province
Name of the state or province from which the specimen was collected, if given on the label. U.S. states are spelled out in full.
County
Name of the county, municipality, borough, parish, or equivalent political unit from which the specimen was collected, if given on the label. The designation (such as "county") is not included in the field value.
Locality
A text description of the location where the specimen was collected, as given on the specimen label. May include national park, national forest, and other land use designations. Older collections often have short and imprecise locality data. Detailed locality data for rare species (threatened, endangered, sensitive, watch, ...) is included in our database but omitted from the search results.
Elevation
Elevations may be given either in feet or meters, and may include a minimum and maximum elevation, representing a range.
Coordinates
May include TRS/PLSS (township, range, section, quarter, etc.), latitude/longitude, and UTM. Coordinates for arare species are included in our database but omittedfrom the search results.
Site Description
This field includes all label information characterizing the site, such habitat, vegetation zone/association, substrate, slope, moisture, associated species, and so on - as the information appears on the specimen label.
Specimen Notes
Includes any characteristics pertaining to the plant specimen itself, such as flower color, fruit length, and plant height, along with information about the species, such as abundance and the precise location and micro-habitat where collected. Also includes any notes or text on the specimen that does not better fit into another field.
Phenology
Specifies the sexual maturity/condition of the specimen, such as flowering, fruiting, cone-bearing, spore-bearing, fertile, or sterile. Phenology is generally not given on the label; instead the person entering the record examines the specimen and selects the appropriate value.
Origin
Specifies whether the specimen is native or introduced to the state or country where it was collected. Origin data is rarely found on the specimen label; instead, it is entered during data entry either from a lookup table or from the date entry personnel's own knowledge. Origin data should be considered supplemental information, and should not be relied on as authoritative.
Cultivated
A Yes/No flag indicating if this is a cultivated specimen. Cultivated specimens generally do not represent valid distribution records and should be excluded from range maps or other geographic analyses.


Disclaimer:

WTU makes a reasonable effort to prevent and correct data entry errors; however, we cannot guarantee that our database is free from typos, misidentifications, or inaccurate label data. Please use the information at your own discretion. Error corrections and comments can be sent to Ben Legler or David Giblin.