New York Natural Heritage Program
Featherfoil
Hottonia inflata Ell.
Dicots
Hottonia inflata plant Robert Sabin
Family: Primrose Family (Primulaceae)

State Protection: Threatened
listed species are those with: 1) 6 to fewer than 20 extant sites, or 2) 1,000 to fewer than 3,000 individuals, or 3) restricted to not less than 4 or more than 7 U.S.G.S. 7 minute topographical maps, or 4) listed as threatened by U.S. Department of Interior.

Federal Protection: Not Listed

State Rarity Rank: S2
A State Rarity Rank of S2 means: This plant is threatened/imperiled in New York because of rarity (typically 6-20 populations or few remaining individuals) or is vulnerable to extirpation from New York due to biological factors.

Global Rarity Rank: G4
A Global Rarity Rank of G4 means: This species is apparently secure globally (typically with more than 100+ populations), though it may be quite rare in parts of its range, especially at the periphery.


Did you know?
Now you see it, now you don't. Featherfoil may appear in great numbers in a pond in one year and be absent for one or many years after that. That may be due to its two-year life cycle or the washing away and reintroduction of seeds. Ducks and beaver seem to be most responsible for spreading the seeds around. The genus was named by Linnaeus for Petrus Hotton (1648-1709), a professor of medicine and botany at Leiden, Holland. The species name refers to the inflated stems that help it float.

State Ranking Justification [-]
There are 14 existing populations but only four of these have sizable numbers. Most populations consist of fewer than 100 plants and need more surveys to determine if they still exist. There are 12 historical occurrences, some of which are considered extirpated.

Short-term Trends [-]

Long-term Trends [-]