Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Stuckenia filiformis subsp. occidentalis
Photo is of parent taxon

potamot filiforme occidental, slender-leaf pondweed, western fineleaf pondweed, western pondweed
Stems

20–100 cm.
Leaves

stipules disintegrating with age, those on proximal portion of stem inflated;

blade inflated; 0.2–5 mm wide.
Inflorescences

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

often absent.

Stuckenia filiformis subsp. occidentalis
Phenology Flowering spring–early fall.
Habitat Calcareous waters, mainly in cold, slow- to fast-flowing streams and rivers, occasionally in standing waters of ponds and lakes
Elevation 0–2195 m (0–7200 ft)
Distribution
from FNA
AK; CO; IA; ID; ME; MI; MN; MT; ND; NH; NM; NV; NY; OR; UT; VT; WA; WI; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT
[BONAP county map]
Discussion

In the Great Lakes region, the name Potamogeton [Stuckenia] vaginatus has often been misapplied to this taxon. The distribution of S. vaginatus is further to the north and west than the Great Lakes region, however. Stuckenia filiformis subsp. occidentaliis rarely produces fruit in the eastern portion of its range, while to the north and west it commonly fruits. This subspecies is very similar to Potamogeton rostratus Hagström ([the combination does not exist within the genus Stuckenia)] of Asia and may prove to be the same taxon. Both grow in similar habitats. The proximal stipules are much enlarged and inflated, and the leaves are generally wider than the other subspecies.

(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. alpina, S. filiformis subsp. filiformis
Synonyms Potamogeton marinus var. occidentalis
Name authority (J. W. Robbins) 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).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America, OregonFlora

The species comparison tool is brought to you by:
Northwest Wildflowers