New York Natural Heritage Program
Bushy St. John's-wort
Hypericum densiflorum Pursh
Dicots
Hypericum densiflorum flowers Stephen M. Young
Family: st. john's-wort family (Clusiaceae)

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?
This species was introduced into the horticulture trade in the US in 1899 (Dirr 1975) but was found in Long Island pine barrens as far back as 1884. Even though the only remaining population occurs in a natural area near large houses where it could have escaped from garden plantings, it could also be a relic from native populations.

State Ranking Justification [-]
There is one small existing population that is currently threatened by Phragmites. Two records from the turn of the 20th century from Western Long Island are now considered gone because their habitat has been destroyed but there's still a chance that one population that was documented in 1916 in Babylon may still be present.

Short-term Trends [-]

Long-term Trends [-]