New York Natural Heritage Program
Smooth Bur-marigold
Bidens laevis (L.) B.S.P.
Dicots
Bidens laevis Stephen M. Young
Family: Aster Family (Asteraceae)

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?
What has been called Bidens laevis along the Hudson River may in fact be a variation of another species since the characters of these plants do not quite match those of the typical Bidens laevis. More work is needed on identification of these specimens. Specimens from wetlands in the rest of the state are a good match for this plant. The species name laevis refers to the smooth stems.

State Ranking Justification [-]
There are ten existing populations along the Hudson River and one in western New York. Historical records on Long Island are probably extirpated and the ten or so historical records from Central and Western New York have not been surveyed in detail and may still be extant.

Short-term Trends [-]

Long-term Trends [-]