Species Details

Malacothamnus mendocinensis

Mendocino bushmallow

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Photo of Malacothamnus mendocinensis
© 2021 Keir Morse
Photo of Malacothamnus mendocinensis
© 2021 Keir Morse
Photo of Malacothamnus mendocinensis
© 2021 Keir Morse
Scientific Name:
Malacothamnus mendocinensis (Eastw.) Kearn.
Common Name:
Mendocino bushmallow
Family: Malvaceae
Element Code: PDMAL0Q0D0
USDA Plants Symbol:
Synonyms/Other Names:
CA Rare Plant Rank: 1B.1
Fed List: None
State List: None
Global Rank: G1Q
State Rank:
Other Status:
CRPR Changes:
changed from 1A to 1B.1 on 2023-01-20
Add Date: 1974-01-01
Date Edited: 2024-06-04
Lifeform: perennial deciduous shrub
Blooming Period: Jun-Aug
215 - 230 meters
705 - 755 feet
General Habitats:
  • Chaparral
  • Cismontane woodland
Microhabitat Details:
  • Roadsides
  • Rocky
Rediscovered at Lake Mendocino in 2016 by J. Xerogeanes. Originally known from only two historical collections near Ukiah (last in 1939). Reason for disappearance likely due to lack of wildfire.
Highly threatened by inundation, fire suppression, and recreational activities. Possibly threatened by road maintenance, herbivory, and competition with weeds.
A synonym of M. fasciculatus in TJM (1993). Not recognized in TJM 2 2012 but recognized in Jepson eFlora 2023 treatment. Current research indicates M. mendocinensis is separated morphologically and phylogenetically from other species in the genus.
Threat List Total: 5
Total EOs % of EOs
EOs with Threat Listed: 2 100 %
Dam/Inundation 1 50%
Improper burning regime 1 50%
Non-native plant impacts 1 50%
Other 1 50%
Road/trail construction/maint. 1 50%
Total Occurrences: 2
Element Occurrence Ranks:
0 0 0 1 1 0
Occurrence Status:
Historical >20 Years 1
Recent <=20 Years 1
Presumed Extant 1
Possibly Extirpated 0
Presumed Extirpated 1
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Mendocino (MEN)*
Quads: Name (Quad Code)
Elledge Peak (3912312)*, Ukiah (3912322)
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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CNPS Status Review: Proposed Change from CRPR 1A, GXQ / SX to 1B.1, G1 / S1 (2023)
Original Description: Leaflets of Western Botany 2:188 (1939)
Taxonomic Treatment: Leaflets of Western Botany 6:113-140 (1951)