New York Natural Heritage Program
Slender Pondweed
Stuckenia filiformis ssp. alpina (Blytt) Haynes, D.H. Les, & M. Kral
Stuckenia filiformis ssp. alpina Ben Legler
Family: Pondweed Family (Potamogetonaceae)

State Protection: Endangered
listed species are those with: 1) 5 or fewer extant sites, or 2) fewer than 1,000 individuals, or 3) restricted to fewer than 4 U.S.G.S. 7 ˝ minute topographical maps, or 4) species listed as endangered by U.S. Department of Interior.

Federal Protection: Not Listed

State Rarity Rank: S1
A State Rarity Rank of S1 means: This plant is endangered/critically imperiled in New York because of extreme rarity (typically 5 or fewer populations or very few remaining individuals) or is extremely vulnerable to extirpation from New York due to biological factors.

Global Rarity Rank: G5T5
A Global Rarity Rank of G5T5 means: Secure globally - Both the species as a whole and the subspecies/variety are common in the world; widespread and abundant (but may be rare in some parts of its range).

Did you know?
The genus was named by Carl Borner (1880-1953), a German entomologist from Bremen, for Wilhelm Adolf Stucken (1860-1901), headmaster of the Gottingen Gymnasium and amateur botanist associated with the Bremen herbarium (Flora of Wisconsin website, Wikipedia contributors). The species name refers to its very narrow leaves and the subspecies to its northern distribution although it occurs farther to the south than the subspecies filiformis which only occurs in northern Canada, Alaska, and Greenland (Flora of North America 2000).

State Ranking Justification [-]
There are 2 verified occurrences,  about 15 historical occurrences of spp. alpina, and 1 verified occurrence and 5 historical occurrences of ssp. occidentalis. The subspecies are being combined into Stuckenia filiformis (Werier 2015).

Short-term Trends [-]

Long-term Trends [-]