Potamogeton diversifolius - Raf.
Waterthread Pondweed
Other English Common Names: Waterthread
Other Common Names: waterthread pondweed
Taxonomic Status: Accepted
Related ITIS Name(s): Potamogeton diversifolius Raf. (TSN 39026)
Unique Identifier: ELEMENT_GLOBAL.2.142049
Element Code: PMPOT03070
Informal Taxonomy: Plants, Vascular - Flowering Plants - Pondweed Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Monocotyledoneae Najadales Potamogetonaceae Potamogeton
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Concept Reference
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Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Potamogeton diversifolius
Conservation Status
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NatureServe Status

Global Status: G5
Global Status Last Reviewed: 10Apr1985
Global Status Last Changed: 10Apr1985
Rounded Global Status: G5 - Secure
Nation: United States
National Status: N5

U.S. & Canada State/Province Status
United States Alabama (SNR), Arizona (SNR), Arkansas (SNR), California (SNR), Colorado (S1), Delaware (S4), District of Columbia (SNR), Florida (SNR), Georgia (SNR), Idaho (S1), Illinois (S3S4), Indiana (S4), Iowa (S3), Kansas (SNR), Kentucky (S5), Louisiana (SNR), Maryland (SNR), Massachusetts (S1), Michigan (SNR), Minnesota (S1), Mississippi (SNR), Missouri (SNR), Montana (SNR), Nebraska (S2), Nevada (SNR), New Jersey (S4), New Mexico (SNR), New York (S1), North Carolina (S5), North Dakota (S2S3), Ohio (SNR), Oklahoma (SNR), Oregon (S1), Pennsylvania (SNR), South Carolina (SNR), South Dakota (SNR), Tennessee (SNR), Texas (SNR), Vermont (SNR), Virginia (S5), West Virginia (S5), Wisconsin (S2), Wyoming (S1)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Occurs primarily from Massachusetts to Minnesota south to Kansas, Texas, and Florida, with outlying and scattered populations in South Dakota, Wyoming, Montana, Idaho, Arizona, and California.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Occurs primarily from Massachusetts to Minnesota south to Kansas, Texas, and Florida, with outlying and scattered populations in South Dakota, Wyoming, Montana, Idaho, Arizona, and California.

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States AL, AR, AZ, CA, CO, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, MI, MN, MO, MS, MT, NC, ND, NE, NJ, NM, NV, NY, OH, OK, OR, PA, SC, SD, TN, TX, VA, VT, WI, WV, WY

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CO Boulder (08013)*
IA Cerro Gordo (19033)*, Jefferson (19101)*, Lee (19111), Wayne (19185)*
IN La Porte (18091)
MA Franklin (25011), Worcester (25027)
MN Anoka (27003), Ramsey (27123)*
ND Billings (38007)*, Emmons (38029)*, Slope (38087), Stutsman (38093)*
NE Clay (31035), Jefferson (31095), Keya Paha (31103)*, Lancaster (31109)*, Pawnee (31133), Sioux (31165)
NY Orange (36071), Putnam (36079)*, Suffolk (36103)*, Westchester (36119)*, Wyoming (36121)
OR Harney (41025), Klamath (41035), Lake (41037)*, Malheur (41045)
WI Adams (55001)*, Burnett (55013), Chippewa (55017), Jackson (55053), Juneau (55057), Oconto (55083), Oneida (55085), Portage (55097), Vilas (55125), Washburn (55129), Wood (55141)
WY Campbell (56005), Crook (56011)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
01 Miller (01080202)+
02 Hudson-Wappinger (02020008)+, Lower Hudson (02030101)+*, Hackensack-Passaic (02030103)+, Northern Long Island (02030201)+*, Southern Long Island (02030202)+*
04 Oconto (04030104)+, Buffalo-Eighteenmile (04120103)+
07 Twin Cities (07010206)+*, Upper St. Croix (07030001)+, Namekagon (07030002)+, Lower St. Croix (07030005)+, Black (07040007)+, Upper Chippewa (07050001)+, South Fork Flambeau (07050003)+, Lower Chippewa (07050005)+, Upper Wisconsin (07070001)+, Castle Rock (07070003)+, Flint-Henderson (07080104)+, Skunk (07080107)+*, Winnebago (07080203)+*, West Fork Cedar (07080204)+*, Upper Iowa (07080207)+*, Lower Des Moines (07100009)+, Kankakee (07120001)+
10 Upper Little Missouri (10110201)+, Middle Little Missouri (10110203)+, Hat (10120108)+, Upper Belle Fourche (10120201)+, Lower Belle Fourche (10120202)+, Redwater (10120203)+, Upper Lake Oahe (10130102)+*, Apple (10130103)+*, Upper Heart (10130202)+*, Upper White (10140201)+, Middle Niobrara (10150004)+*, Keya Paha (10150006)+*, Upper James (10160003)+*, St. Vrain (10190005)+*, Salt (10200203)+*, Big Nemaha (10240008)+, West Fork Big Blue (10270203)+, Upper Little Blue (10270206)+*, Lower Little Blue (10270207)+, Upper Chariton (10280201)+*
17 Middle Owyhee (17050107)+, Upper Malheur (17050116)+, Little Deschutes (17070302)+, Donner Und Blitzen (17120003)+, Warner Lakes (17120007)+*
18 Lost (18010204)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
Help
Technical Description: From CNHP Wetland Guide 2012: Plants: partially submersed.
Stems: slender, terete, 0.5-1 mm thick, to 8 dm long, usually with short lateral branches
Submersed leaves: linear, flat, 1-8 cm long, 0.3-1.5 mm wide, 1(3)-nerved, obtuse to long-acuminate; stipules of submersed leaves 2-18 mm long, membranous, adnate (fusion of unlike parts) to the leaf blade for mostly 1-4 mm, usually adnate for less than ½ of total length
Floating leaves: sometimes lacking, blades elliptic to elliptic-lanceolate or elliptic-cuneate to rounded at the base; petioles mostly 5-40 mm long, 5-20 mm wide, 3- to 17-nerved, acute to rounded at the tip, free of the leaf bases, 2-25 mm long, membranous to weakly fibrous.
Spikes dimorphic, lower submersed spikes capitates to ellipsoid, 1.5-6 mm long, few- to several-fruited, upper spikes ellipsoid to cylindric, 5-30 mm long, usually many-fruited; peduncles slightly clavate (club-shaped), 3-32 mm long.
Fruits: olive to yellowish, round and flattened, with a prominent winged dorsal keel and slightly ridged to winged lateral keels, keels entire to toothed, embryo coil plainly visible through papery thin walls of fruit, beak minute.

Diagnostic Characteristics: From CNHP Wetland Guide 2012: Main Characteristics:
·Two different spikes: lower/submersed is rounded and upper/above water is club-shaped
·Elliptic floating leaves 5-40 mm long are usually present; submersed leaves linear, 6 mm or less wide
·Stipules adnate to submersed leaf blades for mostly 1-4 mm
·Embryo coil visible in fruit

Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
Help
U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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Element Ecology & Life History Edition Date: 17May2001
Element Ecology & Life History Author(s): Cieminski, K. L.

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
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