New York Natural Heritage Program
Creeping St. John's-wort
Hypericum adpressum Raf. ex W. Bart.
Dicots
Hypericum adpressum in flower Stephen M. Young
Family: st. john's-wort family (Clusiaceae)

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: 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 wetland species develops spongy stems and enlarged bases when it grows in water that does not fluctuate. It does not take on this form when it grows in coastal plain ponds where water levels fluctuate from year to year (Enser 2000).

State Ranking Justification [-]
There are nine existing populations, most of them with hundreds of plants. There are five additional populations known from the early 1900s which have not been rediscovered. Three additional populations are considered extirpated.

Short-term Trends [-]

Long-term Trends [-]