New York Natural Heritage Program
Marsh Horsetail
Equisetum palustre L.
Equisetum palustre Stephen M. Young
Family: horsetail family (Equisetaceae)

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?
Species in the genus Equisetum are living members of a group of plants, the sphenophytes, that dominated the landscape during the age of dinosaurs. Some grew up to 100 feet tall but today's plants of the Equisetum family are much smaller, even though some species in South America may reach 15 feet in height.

State Ranking Justification [-]
There are eight existing populations and most of them are in good to excellent condition. There are 14 historical populations and some of them still need to be resurveyed.

Short-term Trends [-]

Long-term Trends [-]