Flora of North America species comparison

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Stuckenia filiformis subsp. alpina
Photo is of parent taxon

fineleaf pondweed, potamot filiforme alpin, slender-leaf pondweed
Stems

10–30 cm.
Leaves

stipules persistent;

those on proximal portion of stem tightly clasping or slightly enlarged, to 1 mm wide.
Inflorescences

peduncles with flower and/or fruits adjacent or separated by less than 2 cm.
Fruits

common.
2n

= 78.

Stuckenia filiformis subsp. alpina
Phenology Flowering spring–early fall.
Habitat Calcareous, saline, or brackish shallow to deep waters of ponds, lakes, streams, ditches, and coastal inshore waters
Elevation 0–3280 m (0–10800 ft)
Distribution
from FNA
AK; AZ; CA; CO; ID; ME; MI; MN; MT; ND; NE; NH; NJ; NM; NV; NY; OH; OR; PA; SD; UT; VT; WA; WI; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT; Greenland; Asia
[BONAP county map]
Discussion

No specimens have been seen from Maryland, but the subspecies is to be expected there.

One hybrid, P. filiformis × P. pectinatus (= P. × suecicus K. Richter), with this species as a putative parent has been described under the genus Potamogeton.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 22.
Parent taxa Potamogetonaceae > Stuckenia > Stuckenia filiformis
Sibling taxa
S. filiformis subsp. filiformis, S. filiformis subsp. occidentalis
Synonyms Potamogeton marinus, Potamogeton borealis, Potamogeton filiformis var. alpinus, Potamogeton filiformis var. borealis, Potamogeton filiformis var. macounii, Potamogeton interior, Potamogeton marinus var. alpinus, Potamogeton marinus var. macounii
Name authority (Blytt) R. R. Haynes: Novon 8: 241. (1998)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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