New York Natural Heritage Program
Small Floating Bladderwort
Utricularia radiata Small
Utricularia radiata 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: 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?
This is one of the few plants in the state where there are fewer historical records than existing populations. Once targeted surveys got underway in the 1980s many new populations were found. The genus name means little bladder while the species name comes from the floating leaves which radiate in all directions (Fernald, 1970).

State Ranking Justification [-]
There are 23 existing populations and 13 are ranked good to excellent in quality. The remaining populations contain fewer than 50 plants each. There are no additional historical records which have not been found or surveyed. This is one of the few rare plants that have more current records than historical records.

Short-term Trends [-]

Long-term Trends [-]