New York Natural Heritage Program
Bushy Rockrose
Crocanthemum dumosum Bickn.
Dicots
Crocanthemum dumosum flower Stephen M. Young
Family: Rock-Rose Family (Cistaceae)

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?
Robert Zaremba, botanist from Cape Cod, calls bushy rockrose the signature species of the maritime grasslands since its beautiful yellow flowers are always present in large healthy examples of this community. The genus name is derived from the Greek for sunflower and refers to the yellow flowers that open only once, when the sun is shining, before the petals fall off. The species name means bushy.

State Ranking Justification [-]
There are 12 existing populations, but only 2 of them are large and extensive. The remainder occur in fairly small patches. There are nine historical occurrences, but 6 of them are considered extirpated.

Short-term Trends [-]

Long-term Trends [-]