New York Natural Heritage Program
Rush Bladderwort
Utricularia juncea Vahl
Dicots
Family: Bladderwort Family (Lentibulariaceae)

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: 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?
Genus name is Latin for having a little bladder or bottle. It refers to the insect-catching underwater bladders of these plants (Fernald 1950). Some earlier treatments of the genus thought that this species was not separate from Utricularia cornuta. They both have linear leaves like those in the rush genus Juncus, thus the species name (Schnell 2002).

State Ranking Justification [-]
There are four existing populations and three of them consist of multiple, hydrologically connected ponds. Populations at each site are only in the hundreds. There are two populations from the early 1900s which have not been resurveyed.

Short-term Trends [-]

Long-term Trends [-]