Taxon Details
Malacothamnus davidsonii
Davidson's bushmallow
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© 2016 Keir Morse |
© 2016 Keir Morse |
© 2006 Gabi McLean |
Taxon Summary:
Malacothamnus davidsonii, commonly known as Davidson's bushmallow, is a perennial deciduous shrub in the Malvaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, Coastal scrub, and Riparian woodland, growing at elevations from 185 to 1140 meters. Malacothamnus davidsonii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Malacothamnus davidsonii (Rob.) Greene |
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Common Name: Davidson's bushmallow |
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| Family: | Malvaceae | |
| Element Code: | PDMAL0Q0V0 | |
| USDA Plants Symbol: | MADA | |
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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: | GNR |
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State Rank: |
S2 |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2024-12-03 |
| Lifeform: perennial deciduous shrub | ||||||||||||||
Blooming Period: Jun-Jan
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Elevation:
185 - 1140 meters 605 - 3740 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: |
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Threats: Threatened by development, erosion/runoff, foot traffic/trampling, herbicides, improper burning regime, non-native plant impacts, ORV activity, road/trail construction/maintenance, vandalism/dumping/litter, waterway bank protection/maintenance, wood cutting or brush clearing. |
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Taxonomy: Formerly included populations from Monterey and San Luis Obispo counties that are now treated as M. discombobulatus; the two species are allopatric and genetically distinct. May intergrade with M. fasciculatus; see Madroño 46(4): 142-152 (1999) for information. |
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| Threat List Total: | 12 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 29 | 55 % |
| THREAT LIST: | ||
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| Other | 16 | 30% |
| Road/trail construction/maint. | 13 | 24% |
| Wood cutting or brush clearing | 9 | 16% |
| Development | 8 | 15% |
| Non-native plant impacts | 6 | 11% |
| ORV activity | 6 | 11% |
| Foot traffic/trampling | 5 | 9% |
| Erosion/runoff | 3 | 5% |
| Biocides | 2 | 3% |
| Improper burning regime | 1 | 1% |
| Vandalism/dumping/litter | 1 | 1% |
| Waterway bank protection/maintenance | 1 | 1% |
| Total Occurrences: | 53 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 6 | 9 | 11 | 1 | 1 | 25 |
| Occurrence Status: | |||||
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| Historical >20 Years | 12 | ||||
| Recent <=20 Years | 41 | ||||
| Presence: | |||||
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| Presumed Extant | 52 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 1 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Los Angeles (LAX) |
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Quads: Name (Quad Code) Burbank (3411823), Condor Peak (3411832), San Fernando (3411834), Sunland (3411833), Van Nuys (3411824) |
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Notes:
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Presumed Extant
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