Taxon Report
Calystegia collina (Greene) Brummitt ssp. oxyphylla BrummittMt. Saint Helena morning-glory |
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Taxon Summary
Calystegia collina ssp. oxyphylla, commonly known as Mt. Saint Helena morning-glory, is a perennial rhizomatous herb in the Convolvulaceae that is found only in California. It occurs within Chaparral, Lower montane coniferous forest, and Valley and foothill grassland, growing at elevations from 279 to 1010 meters. Calystegia collina ssp. oxyphylla is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.Classification
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Scientific Name: |
Calystegia collina (Greene) Brummitt ssp. oxyphylla Brummitt |
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Common Name: |
Mt. Saint Helena morning-glory |
| Family: | Convolvulaceae |
| Element Code: | PDCON04032 |
| USDA Plants Symbol: | CACOO |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial rhizomatous herb |
| Blooming Period: Apr-Jun | Apr-Jun |
| Elevation: | 279-1010 (915-3315) |
| General Habitats: | Chaparral, Lower montane coniferous forest, Valley and foothill grassland |
| Microhabitat: | Serpentine |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 4.2 |
| Global Rank: | G4T3 |
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State Rank: |
S3 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 9 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 2 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 5 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Colusa (COL), Lake (LAK), Marin (MRN), Mendocino (MEN), Napa (NAP), San Benito (SBT), Sonoma (SON) | |
| Quads: Name (Quad Code) | |
| Aetna Springs (3812264), Annapolis (3812363), Bartlett Springs (3912226), Cazadero (3812351), Chiles Valley (3812253), Cloverdale (3812371), Detert Reservoir (3812265), Duncans Mills (3812341), Fort Ross (3812352), Highland Springs (3812288), Hopland (3812381), Hough Springs (3912225), Jimtown (3812267), Kenwood (3812245), Leesville (3912224), Mark West Springs (3812256), Middletown (3812275), Mount St. Helena (3812266), San Benito Mtn. (3612036), San Rafael (3712285), The Geysers (3812277), Warm Springs Dam (3812361), Whispering Pines (3812276), Wilbur Springs (3912214) | |
Threat List Data from the CNDDB
| Threat List Total: | 4 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 3 | 33 % | |
| Foot traffic/trampling | 2 | 22% |
| Road/trail construction/maint. | 2 | 22% |
| Vandalism/dumping/litter | 1 | 11% |
| Erosion/runoff | 1 | 11% |
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 February 2025].