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Calycadenia micrantha
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| Common Name: |
small-flowered calycadenia
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| Family: |
Asteraceae
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| Synonyms: |
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| Element Code: |
PDAST1P0C0
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| Full Name: |
Calycadenia micrantha R.L. Carr & G.D. Carr
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| USDA PLANTS Symbol: |
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Biology  |
- Lifeform:
annual herb
- Blooming Period:
June - September
- Habitat:
Roadsides, rocky, talus, scree, sometimes serpentinite, sparsely vegetated areas.
• Chaparral
• Meadows and seeps (volcanic)
• Valley and foothill grassland
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| Rarity Status |
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Occurrence Data from DFG
California Natural Diversity Database |
- Total # of Known Element Occurrences:
16
- Element Occurrence Ranks:
Population Status:
Historic
>20 yrs |
Recent
<=20 yrs |
| 2 |
14 |
- Presence:
| Present Extant |
Possibly Extirpated |
Extirpated |
| 16 |
0 |
0 |
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| Notes |
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Most populations small. Surveys at type locality unsuccessful in 2005. Threatened by road maintenance, and potentially threatened by fuel breaks, development, alteration of fire regimes, non-native plants, military activities, and feral pigs. Not in The Jepson Manual. Formerly included in C. truncata ssp. microcephala, a synonym of C. truncata in the Jepson Manual (1993). See SIDA 21(2):261 (2004) for original description.
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To submit rare plant observation data, use the
CNDDB field survey form.
Please see also the CNPS
Rare Plant Data page.
- Date Added:
2005-01-01
- Last Update:
2011-05-06
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| Location |
- Elevation:
5 - 1500 meters
- California Endemic:
yes
- States:
California
- California Counties and Islands:
name (code)
Colusa (COL), Lake (LAK), Monterey (MNT), Napa (NAP), Trinity (TRI)
- Quads:
name (DWR code) USGS code
Alder Peak (296A) 35121H3, Burro Mountain (296D) 35121G3, Yountville (500A) 38122D3, Highland Springs (534B) 38122H8, Bartlett Springs (548B) 39122B6, Bartlett Mtn. (549A) 39122B7, Upper Lake (549B) 39122B8, Elk Mountain (565C) 39122C8, Potato Hill (565D) 39122C7, Swim Ridge (614B) 40123B2, Sportshaven (633B) 40123D4
- Notes:
| Definitions of codes preceding a county and/or quad: |
| * |
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Presumed extirpated |
| ? |
| Uncertain about distribution or identity
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| ?* |
| Uncertain about distribution, but presumed extirpated if once present
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| (?) |
| Occurrence confirmed, but possibly extirpated
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Species may be present in other areas where conditions are favorable.
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 Presumed Extant
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 Presumed Extirpated or Unknown
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2100 |
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| Links to Leading Resources of Taxon Information |
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| Suggested Citation |
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California Native Plant Society (CNPS).
Inventory of Rare and Endangered Plants (online edition, v8-02).
California Native Plant Society. Sacramento, CA. Accessed on
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-122.875,38.875
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