Species Details

Crocanthemum greenei

island rush-rose

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Scientific Name:
Crocanthemum greenei (B.L. Rob.) Sorrie
Common Name:
island rush-rose
Family: Cistaceae
Element Code: PDCIS02090
USDA Plants Symbol:
Synonyms/Other Names:
Lifeform: perennial evergreen shrub
Blooming Period: (Jan)Mar-Jul(Aug)
JFMAMJJASOND
Elevation:
15 - 490 meters
50 - 1610 feet
General Habitats:
  • Closed-cone coniferous forest
  • Chaparral
  • Cismontane woodland
  • Coastal scrub
Microhabitat Details:
Microhabitat:
  • Openings
  • Rocky
Notes:
Six occurrences were discovered between 1999 and 2006 on SRO Isl., where it had not been collected since the 1930's. Presumed extirpated on SMI Isl., where it was last collected in 1939. Increasing on SCZ Isl. After reduction of feral herbivore population. Threatened by herbivory from non-native deer on SCT Isl. Also threatened by altered fire regimes and non-native plants. Possibly threatened by erosion. Hybridizes with H. scoparium.
Threats:
Taxonomy:
Threat List Total: 8
Total EOs % of EOs
EOs with Threat Listed: 15 23 %
THREAT LIST:
Grazing 8 12%
Non-native animal impacts 8 12%
Foot traffic/trampling 7 10%
Erosion/runoff 5 7%
Non-native plant impacts 4 6%
Total Occurrences: 66
Element Occurrence Ranks:
A B C D X U
1 16 7 2 1 39
Occurrence Status:
Historical >20 Years 47
Recent <=20 Years 19
Presence:
Presumed Extant 65
Possibly Extirpated 1
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Los Angeles (LAX), Santa Barbara (SBA)
Quads: Name (Quad Code)
San Miguel Island East (3312083), San Miguel Island West (3312084)*, Santa Catalina East (3311833), Santa Catalina North (3311844), Santa Catalina South (3311834), Santa Catalina West (3311845), Santa Cruz Island A (3311987), Santa Cruz Island B (3311986), Santa Cruz Island C (3311985), Santa Cruz Island D (3311984), Santa Rosa Island East (3311988), Santa Rosa Island North (3312081), Santa Rosa Island South (3312071)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant
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