Species Details

Lessingia micradenia var. micradenia

Tamalpais lessingia

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Photo of Lessingia micradenia var. micradenia
© 2015 Vernon Smith
Photo of Lessingia micradenia var. micradenia
© 2016 Aaron Schusteff
Photo of Lessingia micradenia var. micradenia
© 2011 Vernon Smith
Scientific Name:
Lessingia micradenia Greene var. micradenia
Common Name:
Tamalpais lessingia
Family: Asteraceae
Element Code: PDAST5S063
USDA Plants Symbol: LEMIM
Synonyms/Other Names:
Lifeform: annual herb
Blooming Period: (Jun)Jul-Oct
JFMAMJJASOND
Elevation:
100 - 500 meters
330 - 1640 feet
General Habitats:
  • Chaparral
  • Valley and foothill grassland
Microhabitat Details:
Microhabitat:
  • Roadsides (often)
  • Serpentine (usually)
Notes:
Known from only four occurrences in the Mt. Tamalpais area. See Leaflets of Botanical Observation and Criticism 2:28 (1910) for original description, and University of California Publications in Botany 16:39-40 (1929) for taxonomic treatment.
Threats:
Taxonomy:
Threat List Total: 4
Total EOs % of EOs
EOs with Threat Listed: 1 11 %
THREAT LIST:
Biocides 1 11%
Erosion/runoff 1 11%
Foot traffic/trampling 1 11%
Road/trail construction/maint. 1 11%
Total Occurrences: 9
Element Occurrence Ranks:
A B C D X U
0 1 0 0 0 8
Occurrence Status:
Historical >20 Years 6
Recent <=20 Years 3
Presence:
Presumed Extant 9
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Marin (MRN)
Quads: Name (Quad Code)
Bolinas (3712286), Novato (3812215), San Geronimo (3812216), San Rafael (3712285)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant
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