CNPS

CNPS Rare Plant Inventory

Species Details

Malacothamnus aboriginum

Indian Valley bush-mallow

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Photo of Malacothamnus aboriginum
© 2009 Keir Morse 		Photo of Malacothamnus aboriginum
© 2011 Chris Winchell 		Photo of Malacothamnus aboriginum
© 2017 Keir Morse

  Classification

Scientific Name:
Malacothamnus aboriginum (Rob.) Greene
Common Name:
Indian Valley bush-mallow
Family: Malvaceae
Element Code: PDMAL0Q020
USDA Plants Symbol: MAAB2
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G3
State Rank:
 S3
Other Status: BLM_S; SB_CalBG/RSABG; SB_SBBG
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2022-03-01

  Ecology and Life History

Lifeform: perennial deciduous shrub
Blooming Period: Apr-Oct
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Elevation:
150 - 1700 meters
490 - 5580 feet
General Habitats:
  • Chaparral
  • Cismontane woodland
Microhabitat Details:
Microhabitat:
  • Burned areas (often)
  • Granitic
  • Rocky

  Notes

Notes:
Appears in abundance after fires. Threatened by grazing, vehicles, road maintenance. M. enigmaticus specimens from SDG Co. have been confused with this species. See Synoptical Flora of North America 1(1):311 (1897) for original description.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 6
Total EOs % of EOs
EOs with Threat Listed: 8 13 %
THREAT LIST:
Grazing 4 6%
Road/trail construction/maint. 3 4%
Biocides 1 1%
Mining 1 1%
Non-native plant impacts 1 1%

  Occurrence Data from the CNDDB

Total Occurrences: 63
Element Occurrence Ranks:
A B C D X U
0 2 2 3 0 56
Occurrence Status:
Historical >20 Years 36
Recent <=20 Years 27
Presence:
Presumed Extant 63
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Fresno (FRE), Kings (KNG), Monterey (MNT), San Benito (SBT)
Quads: Name (Quad Code)
Alcalde Hills (3612024), Bickmore Canyon (3612152), Cherry Peak (3612162), Ciervo Mtn. (3612045), Curry Mountain (3612014), Garza Peak (3512082), Gonzales (3612154), Hepsedam Peak (3612037), Hernandez Reservoir (3612047), Hollister (3612174), Idria (3612046), Joaquin Rocks (3612034), Llanada (3612058), Lonoak (3612038), North Chalone Peak (3612142), Paicines (3612163)?, Panoche Pass (3612161), Pinalito Canyon (3612131), Rock Spring Peak (3612048), San Benito (3612151), San Benito Mtn. (3612036), Santa Rita Peak (3612035), Smith Mountain (3612015), Soledad (3612143), Stockdale Mountain (3512085), The Dark Hole (3512083), Topo Valley (3612141), Tres Pecos Farms (3612043), Tres Pinos (3612173), Valleton (3512086)
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. 2023. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 29 November 2023].