New York Natural Heritage Program
Button Sedge
Carex bullata Schkuhr ex Willd.
Carex bullata line drawing Britton, N.L., and A. Brown (1913); downloaded from USDA-Plants Database.
Family: Sedge Family (Cyperaceae)

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?
The species name is derived from the Latin "bullatus" which mean inflated and refers to the inflated perigynia of the spike (Fernald 1950). After its discovery in New York in 1894 it was collected many times on Long Island through 1929. There were no subsequent collections for 30 years until Stanley Smith of the NY State Museum collected it again in 1959 after its habitat had been severely reduced by development.

State Ranking Justification [-]
There are four existing populations with substantial numbers of plants. There are 17 populations documented from the late 1800s and early 1900s that have not been resurveyed and eight populations, mainly from western Long Island, that are now considered extirpated.

Short-term Trends [-]

Long-term Trends [-]