Taxon Report
Calystegia stebbinsii BrummittStebbins' morning-glory |
 Steven Perry |
Taxon Summary
Calystegia stebbinsii, commonly known as Stebbins' morning-glory, is a perennial rhizomatous herb in the Convolvulaceae that is found only in California. It occurs within Chaparral (openings), and Cismontane woodland, growing at elevations from 185 to 1090 meters. Calystegia stebbinsii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Calystegia stebbinsii Brummitt |
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Common Name: |
Stebbins' morning-glory |
| Family: | Convolvulaceae |
| Element Code: | PDCON040H0 |
| USDA Plants Symbol: | CAST21 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial rhizomatous herb |
| Blooming Period: Apr-Jul | Apr-Jul |
| Elevation: | 185-1090 (605-3575) |
| General Habitats: | Chaparral, Cismontane woodland |
| Microhabitat: | Gabbroic (sometimes), Seeps (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | FE |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 15 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 2 |
| Fair (C) | 7 |
| Poor (D) | 1 |
| None (X) | 4 |
| Unknown (U) | 0 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| El Dorado (ELD), Nevada (NEV) | |
| Quads: Name (Quad Code) | |
| Coloma (3812078), Grass Valley (3912121), Pilot Hill (3812171), Rough And Ready (3912122), Shingle Springs (3812068) | |
Threat List Data from the CNDDB
| Threat List Total: | 11 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 14 | 93 % | |
| Development | 14 | 93% |
| Road/trail construction/maint. | 7 | 46% |
| Non-native plant impacts | 5 | 33% |
| Vandalism/dumping/litter | 4 | 26% |
| ORV activity | 3 | 20% |
| Improper burning regime | 2 | 13% |
| Biocides | 2 | 13% |
| Landfill | 1 | 6% |
| Erosion/runoff | 1 | 6% |
| Foot traffic/trampling | 1 | 6% |
| Recreational use (non-ORV) | 1 | 6% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 November 2025].