Taxon Report
Crocanthemum suffrutescens (B. Schreib.) SorrieBisbee Peak rush-rose |
|
Taxon Summary
Crocanthemum suffrutescens, commonly known as Bisbee Peak rush-rose, is a perennial evergreen shrub in the Cistaceae that is found only in California. It occurs within Chaparral, growing at elevations from 75 to 670 meters. Crocanthemum suffrutescens is ranked 3.2, Plants About Which We Need More Information, A Review List; Moderately threatened in California.Classification
|
Scientific Name: |
Crocanthemum suffrutescens (B. Schreib.) Sorrie |
|
Common Name: |
Bisbee Peak rush-rose |
| Family: | Cistaceae |
| Element Code: | PDCIS020F0 |
| USDA Plants Symbol: | |
|
Synonyms/Other Names: |
|
Ecology and Life History
| Lifeform: | perennial evergreen shrub |
| Blooming Period: Apr-Aug | Apr-Aug |
| Elevation: | 75-670 (245-2200) |
| General Habitats: | Chaparral |
| Microhabitat: | Burned areas (often), Disturbed areas (often), Gabbroic (often) |
| Microhabitat Details: | Often lone soil |
Conservation Status
| CA Rare Plant Rank: | 3.2 |
| Global Rank: | G2?Q |
|
State Rank: |
S2? |
| State List: | None |
| Fed List: | None |
| Other Status: | |
|
CRPR Changes: |
|
Occurrence Data from the CNDDB
| Total Occurrences: | 31 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 8 |
| Fair (C) | 6 |
| Poor (D) | 1 |
| None (X) | 0 |
| Unknown (U) | 14 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Amador (AMA), Calaveras (CAL), El Dorado (ELD) | |
| Quads: Name (Quad Code) | |
| Carbondale (3812141), Clarksville (3812161), Ione (3812038), Irish Hill (3812048), Mokelumne Hill (3812036), Pilot Hill (3812171), San Andreas (3812026), Shingle Springs (3812068) | |
Threat List Data from the CNDDB
| Threat List Total: | 9 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 18 | 58 % | |
| Development | 9 | 29% |
| Road/trail construction/maint. | 7 | 22% |
| ORV activity | 6 | 19% |
| Mining | 3 | 9% |
| Other | 2 | 6% |
| Recreational use (non-ORV) | 1 | 3% |
| Vandalism/dumping/litter | 1 | 3% |
| Non-native plant impacts | 1 | 3% |
| Improper burning regime | 1 | 3% |
Notes
| Move to CRPR 1B? Herbarium material indicates taxon is conspecific with C. scoparium, but field studies reveal differences; definitive taxonomic study needed. Threatened by mining, development, and vehicles. A synonym of Helianthemum scoparium in TJM (1993) and TJM 2. See Madroño 5:81 (1939) for original description and Phytologia 93(2):271 (2011) for revised nomenclature. |
|
Threats: |
|
Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 18 November 2025].