New York Natural Heritage Program
Comb-leaved Mermaid-weed
Proserpinaca pectinata Lam.
Proserpinaca pecintata's comb-like leaves. Stephen M. Young
Family: Water-Milfoil Family (Haloragaceae)

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: G5
A Global Rarity Rank of G5 means: This species is demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.

Did you know?
The species name is Latin for comb-like and refers to the appearance of the dissected leaves (Fernald 1950).

State Ranking Justification [-]
There are six existing populations and three of them consist of multiple ponds that are hydrologically connected. Most of the populations are on protected parkland, but they may still be subject to some disturbance. There are two historical populations from the 1920s that have not been resurveyed.

Short-term Trends [-]

Long-term Trends [-]