New York Natural Heritage Program
Butterwort
Pinguicula vulgaris L.
Dicots
Pinguicula vulgaris Troy Weldy
Family: Bladderwort Family (Lentibulariaceae)

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: S1S2
A State Rarity Rank of S1S2 means: Critically Imperiled or Imperiled in New York - Especially or very vulnerable to disappearing from New York due to rarity or other factors; typically 20 or fewer populations or locations in New York, very few individuals, very restricted range, few remaining acres (or miles of stream), and/or steep declines. More information is needed to assign a single conservation status.

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?
Butterwort is New York's only insectivorous plant which is not found in a marsh, bog, or swamp. Sometimes its pollinators are also unlucky enough to be caught and absorbed by the leaves. The name butterwort comes from its old world reputation of having medicinal and culinary uses. The juices from the leaves were rubbed onto cows' udders to protect them from infection. Another reference to butter was the use of its leaves to curdle milk. The genus name Pinguicula can be translated as little fat one or fattish for the greasy texture of the leaves.

State Ranking Justification [-]
There are six known populations and approximately six additional historical populations of this plant. Most of these populations are on well-protected cliffs, but some cliffs may be subject to natural or artificial sloughing. This plant has a limited range, and an even greater limited habitat. As a plant at the southern limit of its range, it has always likely been rare in New York.

Short-term Trends [-]

Long-term Trends [-]