New York Natural Heritage Program
Long's Bittercress
Cardamine longii Fern.
Cardamine longii Stephen M. Young
Family: Mustard Family (Brassicaceae)

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: G3?
A Global Rarity Rank of G3? means: Vulnerable globally (most likely) - Conservation status is uncertain, but most likely at moderate risk of extinction due to rarity or other factors; typically 80 or fewer populations or locations in the world, few individuals, restricted range, few remaining acres (or miles of stream), and/or recent and widespread declines. More information is needed to assign a firm conservation status.

Did you know?
This plant is named for one of its discoverers, Bayard Long, a famous Pennsylvania botanist from the early 1900s. This is one of the few rare plants in New York where we have discovered more new populations than known historical populations. This may be due to the increased exploration in the last 20 years of the difficult terrain of freshwater tidal mud flats.

State Ranking Justification [-]
This plant of tidal areas was once thought to be restricted to Long Island but in recent years has apparently been expanding its range northward up the Hudson River. Of the eleven known populations, nine are located along the Hudson River. The habitats on Long Island have been exploited, but most of today's known populations are found in protected landscapes. This inconspicuous plant is easily overlooked, so more populations are likely. Typical populations range from a few individuals to a few hundred plants.

Short-term Trends [-]

Long-term Trends [-]