Taxon Details
Calystegia collina ssp. tridactylosa
three-fingered morning-glory
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Taxon Summary:
Calystegia collina ssp. tridactylosa, commonly known as three-fingered morning-glory, is a perennial rhizomatous herb in the Convolvulaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 0 to 600 meters. Calystegia collina ssp. tridactylosa is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Calystegia collina (E.Greene) Brummitt ssp. tridactylosa (Eastw.) Brummitt |
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Common Name: three-fingered morning-glory |
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| Family: | Convolvulaceae | |
| Element Code: | PDCON04036 | |
| USDA Plants Symbol: | CACOT | |
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G4T1T2 |
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State Rank: |
S1S2 |
| Other Status: | BLM_S |
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CRPR Changes: added to 1B.2 on 2006-11-17 |
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| Add Date: | 2006-11-17 |
| Date Edited: | 2025-10-29 |
| Lifeform: perennial rhizomatous herb | ||||||||||||||
Blooming Period: Apr-Jun
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Elevation:
0 - 600 meters 0 - 1970 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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Notes: Potentially threatened by geothermal energy development. May intergrade with Calystegia occidentalis ssp. occidentalis and Calystegia malacophylla ssp. malacophylla. See Proceedings of the California Academy of Sciences, series 4, 20: 151 (1931) for original description and Annals of the Missouri Botanical Garden 52(2): 214-216 (1965) for revised nomenclature. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 2 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 2 | 18 % |
| THREAT LIST: | ||
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| Development | 2 | 18% |
| Road/trail construction/maint. | 1 | 9% |
| Total Occurrences: | 11 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 2 | 0 | 1 | 0 | 0 | 8 |
| Occurrence Status: | |||||
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| Historical >20 Years | 4 | ||||
| Recent <=20 Years | 7 | ||||
| Presence: | |||||
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| Presumed Extant | 11 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Colusa (COL), Lake (LAK), Mendocino (MEN) |
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Quads: Name (Quad Code) Brushy Mtn. (3912352), Covelo West (3912373), Dos Rios (3912363), Hull Mountain (3912258), Jamison Ridge (3912362), Leesville (3912224), Plaskett Ridge (3912268), The Geysers (3812277), Wilbur Springs (3912214) |
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Notes:
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Presumed Extant
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