Taxon Details
Malacothamnus arcuatus var. arcuatus
arcuate bushmallow
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© 2017 Keir Morse |
© 2017 Keir Morse |
© 2017 Keir Morse |
Taxon Summary:
Malacothamnus arcuatus var. arcuatus, commonly known as arcuate bushmallow, is a perennial deciduous shrub in the Malvaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 15 to 355 meters. Malacothamnus arcuatus var. arcuatus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Malacothamnus arcuatus (Greene) Greene var. arcuatus |
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Common Name: arcuate bushmallow |
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| Family: | Malvaceae | |
| Element Code: | PDMAL0Q0E0 | |
| USDA Plants Symbol: | ||
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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: | G2Q |
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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: | 2024-06-04 |
| Lifeform: perennial deciduous shrub | ||||||||||||||
Blooming Period: Apr-Sep
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Elevation:
15 - 355 meters 50 - 1165 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 alteration of fire regimes. |
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Taxonomy: A synonym of M. fasciculatus in The Jepson Manual. See Manual of the Botany of the Region of San Francisco Bay, p. 66 (1894) by E. Greene for original description, Leaflets of Botanical Observation and Criticism 1:208 (1906) for revised nomenclature, and Leaflets of Western Botany 6(6):132-133 (1951) for taxonomic treatment. |
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| Threat List Total: | 8 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 14 | 38 % |
| THREAT LIST: | ||
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| Development | 6 | 16% |
| Road/trail construction/maint. | 5 | 13% |
| Non-native plant impacts | 3 | 8% |
| Other | 3 | 8% |
| Erosion/runoff | 2 | 5% |
| Improper burning regime | 2 | 5% |
| Insufficient population/stand size | 1 | 2% |
| Wood cutting or brush clearing | 1 | 2% |
| Total Occurrences: | 37 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 3 | 4 | 5 | 2 | 2 | 21 |
| Occurrence Status: | |||||
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| Historical >20 Years | 17 | ||||
| Recent <=20 Years | 20 | ||||
| Presence: | |||||
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| Presumed Extant | 35 | ||||
| Possibly Extirpated | 1 | ||||
| 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) San Mateo (SMT), Santa Clara (SCL), Santa Cruz (SCR) |
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Quads: Name (Quad Code) Big Basin (3712222), Cupertino (3712231), La Honda (3712233), Laurel (3712118), Loma Prieta (3712117), Los Gatos (3712128), Mindego Hill (3712232), Montara Mountain (3712254), Mt. Madonna (3712116), Palo Alto (3712242), San Francisco South (3712264), San Mateo (3712253), Santa Teresa Hills (3712127), Woodside (3712243) |
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Notes:
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Presumed Extant
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