CNPS

CNPS Rare Plant Inventory

Species Details

Malacothrix indecora

Santa Cruz Island malacothrix

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  Classification

Scientific Name:
Malacothrix indecora Greene
Common Name:
Santa Cruz Island malacothrix
Family: Asteraceae
Element Code: PDAST660J0
USDA Plants Symbol: MAIN2
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.1
Fed List: FE (1997-07-31)
State List: None
Global Rank: G2
State Rank:
 S2
Other Status: SB_SBBG
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2022-03-01

  Ecology and Life History

Lifeform: annual herb
Blooming Period: Apr-Sep
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Elevation:
5 - 30 meters
15 - 100 feet
General Habitats:
  • Coastal bluff scrub
  • Chaparral
  • Coastal dunes
  • Coastal scrub
Microhabitat Details:
Microhabitat:
  • Rocky

  Notes

Notes:
Known from fewer than ten occurrences. Threatened by feral herbivores, and possibly by erosion. See Bulletin of the California Academy of Sciences 2:152 (1886) for original description, and Madroño 44(3):223-244 (1997) for taxonomic treatment.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 3
Total EOs % of EOs
EOs with Threat Listed: 6 86 %
THREAT LIST:
Erosion/runoff 6 85%
Non-native plant impacts 6 85%
Foot traffic/trampling 3 42%

  Occurrence Data from the CNDDB

Total Occurrences: 7
Element Occurrence Ranks:
A B C D X U
0 4 0 0 0 3
Occurrence Status:
Historical >20 Years 4
Recent <=20 Years 3
Presence:
Presumed Extant 7
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Santa Barbara (SBA)
Quads: Name (Quad Code)
San Miguel Island East (3312083), Santa Cruz Island A (3311987), Santa Cruz Island B (3311986)*, Santa Cruz Island C (3311985), Santa Rosa Island North (3312081)
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.
Regional Map

  Map

Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 24 November 2024].