New York Natural Heritage Program
Rugulose Grape Fern
Botrychium rugulosum W.H. Wagner
Botrychium rugulosum Stephen M. Young
Family: adder's-tongue family (Ophioglossaceae)

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: G3
A Global Rarity Rank of G3 means: This species is either rare and local throughout its range (21 to 100 occurrences), or found locally (even abundantly at some of its locations) in a restricted range (e.g. a single physiographic region), or is vulnerable to extinction throughout its range because of other factors.


Did you know?
This fern often occurs in the company of other similar-looking grapeferns. If many individuals are seen in one population they must be carefully examined to identify separate species. The species name comes from the Latin "ruga", meaning wrinkled, and refers to the wrinkled surface of the leaf.

State Ranking Justification [-]
There are two existing populations with only one to a few plants in each population. There are eight historical populations but none of them has been seen since the late 1940s.

Short-term Trends [-]

Long-term Trends [-]