New York Natural Heritage Program
Dwarf Bulrush
Cyperus subsquarrosus (Muhl.) Bauters
Lipocarpha micrantha Tammy Larson
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 genus name comes from the Greek lipos, meaning fat, and carphos, meaning chaff. It refers to the thickness of the inner scales of some of the species. Micrantha means tiny-flowered (Fernald 1949). This plant may often be overlooked because it is so small.

State Ranking Justification [-]
There are 7 existing populations but only two of them are in good condition. The others are small populations around highly impacted ponds. One small population may no longer exist. There are 11 historical populations but most of these have not been searched in detail.

Short-term Trends [-]

Long-term Trends [-]