New York Natural Heritage Program
Hooker's Orchid
Platanthera hookeri (Torr. ex Gray) Lindl.
Monocots
Platanthera hookeri Janet Novak
Family: Orchid Family (Orchidaceae)

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: G4
A Global Rarity Rank of G4 means: This species is apparently secure globally (typically with more than 100+ populations), though it may be quite rare in parts of its range, especially at the periphery.


Did you know?
Similar to Platanthera orbiculata and Platanthera macrophylla, Platanthera hookeri has a pair of large rounded leaves that lie flat against the ground. In 19th-century Vermont the leaves were applied as a plaster to heal weak lungs, and to heal bruises and reduce soreness. The species was named by 19th-century English botanist John Lindley for his colleague Sir William Jackson Hooker, director of Kew Gardens in London. Lindley was instrumental in saving the garden from destruction in the 1830s.

State Ranking Justification [-]
There are four known populations. Two additional populations have been reported in the last 20 years that recent surveys have failed to relocate. Populations of this plant have declined sharply over the past 100 years. The reasons for this are unknown, but acid rain has been speculated as a likely cause.

Short-term Trends [-]

Long-term Trends [-]