Species Details

Lessingia arachnoidea

Crystal Springs lessingia

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Photo of Lessingia arachnoidea
© 2008 Neal Kramer
Photo of Lessingia arachnoidea
© 2014 Chris Winchell
Photo of Lessingia arachnoidea
© 2008 Neal Kramer
Lifeform: annual herb
Blooming Period: Jul-Oct
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Elevation:
60 - 200 meters
195 - 655 feet
General Habitats:
  • Cismontane woodland
  • Coastal scrub
  • Valley and foothill grassland
Microhabitat Details:
Microhabitat:
  • Roadsides (often)
  • Serpentine
Notes:
Known only from near Crystal Springs Reservoir (SMT Co.); occurrences from SON Co. (502B, 518C) need taxonomic verification. Threatened by non-native plants and pipeline maintenance. See Leaflets of Botanical Observation and Criticism 2:29 (1910) for original description.
Threats:
Taxonomy:
Threat List Total: 6
Total EOs % of EOs
EOs with Threat Listed: 9 82 %
THREAT LIST:
Other 6 54%
Non-native plant impacts 5 45%
Road/trail construction/maint. 4 36%
Vandalism/dumping/litter 1 9%
Disking 1 9%
Total Occurrences: 11
Element Occurrence Ranks:
A B C D X U
2 4 2 0 0 3
Occurrence Status:
Historical >20 Years 5
Recent <=20 Years 6
Presence:
Presumed Extant 11
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
San Mateo (SMT), Sonoma (SON)
Quads: Name (Quad Code)
Camp Meeker (3812248), Duncans Mills (3812341), Montara Mountain (3712254), San Mateo (3712253), Woodside (3712243)
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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