Species Details
Calycadenia micrantha
small-flowered calycadenia
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Species Description:
Calycadenia micrantha, commonly known as small-flowered calycadenia, is a annual herb in the Asteraceae that is found only in California. It occurs within Chaparral, Meadows and seeps (volcanic), and Valley and foothill grassland, growing at elevations from 5 to 1500 meters. Calycadenia micrantha is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Calycadenia micrantha R.L. Carr & G.D. Carr |
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Common Name: small-flowered calycadenia |
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| Family: | Asteraceae | |
| Element Code: | PDAST1P0C0 | |
| USDA Plants Symbol: | CAMI53 | |
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Synonyms/Other Names: |
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| Name Status: |
JEP, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G2 |
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State Rank: |
S2 |
| Other Status: | BLM_S; USFS_S |
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CRPR Changes: added to 1B on 2005-10-24 |
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| Add Date: | 2005-01-01 |
| Date Edited: | 2024-11-05 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Jun-Sep
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Elevation:
5 - 1500 meters 15 - 4920 feet |
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General Habitats:
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| Microhabitat Details: sparsely vegetated areas | ||||||||||||||
Microhabitat:
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Notes: Most populations small. Surveys at type locality unsuccessful in 2005. |
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Threats: Threatened by road maintenance, and potentially threatened by fuel breaks, development, alteration of fire regimes, non-native plants, military activities, and feral pigs. |
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Taxonomy: Formerly included in C. truncata ssp. microcephala, a synonym of C. truncata in TJM (1993). |
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| Threat List Total: | 8 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 8 | 36 % |
| THREAT LIST: | ||
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| Foot traffic/trampling | 3 | 13% |
| Non-native plant impacts | 3 | 13% |
| Other | 2 | 9% |
| Grazing | 2 | 9% |
| Military operations | 2 | 9% |
| Feral pigs | 1 | 4% |
| Improper burning regime | 1 | 4% |
| Road/trail construction/maint. | 1 | 4% |
| Total Occurrences: | 22 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 5 | 1 | 0 | 0 | 15 |
| Occurrence Status: | |||||
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| Historical >20 Years | 12 | ||||
| Recent <=20 Years | 10 | ||||
| Presence: | |||||
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| Presumed Extant | 22 | ||||
| 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), Humboldt (HUM), Lake (LAK), Monterey (MNT), Trinity (TRI) |
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Quads: Name (Quad Code) Alder Peak (3512183), Bartlett Mtn. (3912227), Bartlett Springs (3912226), Blake Mountain (4012355), Burro Mountain (3512173), Elk Mountain (3912238), Highland Springs (3812288), Lake Mountain (4012314), Long Ridge (4012313), Potato Hill (3912237), Sportshaven (4012344), Swim Ridge (4012322), Upper Lake (3912228) |
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Notes:
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Presumed Extant
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