CNPS

CNPS Rare Plant Inventory



Taxon Details

Malacothamnus helleri

Heller's bushmallow

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Photo of Malacothamnus helleri
© 2017 Keir Morse 		Photo of Malacothamnus helleri
© 2017 Keir Morse 		Photo of Malacothamnus helleri
© 2017 Keir Morse

Taxon Summary:

Malacothamnus helleri, commonly known as Heller's bushmallow, is a perennial deciduous shrub in the Malvaceae that is found only in California. It occurs within Chaparral (sandstone), and Riparian woodland (gravel), growing at elevations from 305 to 635 meters. Malacothamnus helleri is ranked 3.3, Plants About Which We Need More Information, A Review List; Not very threatened in California.

  Classification

Scientific Name:
Malacothamnus helleri (Eastw.) Kearn.
Common Name:
Heller's bushmallow
Family: Malvaceae
Element Code: PDMAL0Q0G0
USDA Plants Symbol:
Synonyms/Other Names:
Name Status: JEF, FNA, POWO,
IPNI, Tropicos

  Conservation Status

CA Rare Plant Rank: 3.3
Fed List: None
State List: None
Global Rank: G2Q
State Rank:
 S2
Other Status:
CRPR Changes:
changed from 4.3 to 3.3 on 2014-12-15
Add Date: 1974-01-01
Date Edited: 2024-05-09

  Ecology and Life History

Lifeform: perennial deciduous shrub
Blooming Period: May-Jul
JFMAMJJASOND
Elevation:
305 - 635 meters
1000 - 2085 feet
General Habitats:
  • Chaparral (sandstone)
  • Riparian woodland (gravel)
Microhabitat Details:
Microhabitat:

  Notes

Notes:
Previously CRPR 4.3; move to CRPR 1B? Location, rarity, and taxonomic information needed. See Leaflets of Western Botany 1(18):217-218 (1936) for original description and 6(6):124-125 (1951) for taxonomic treatment.
Threats:
Taxonomy:
A synonym of M. fremontii in TJM (1993) and TJM 2.

  Threat List Data from the CNDDB

Threat List Total: 0
Total EOs % of EOs
EOs with Threat Listed: 0 0 %
THREAT LIST:

  Occurrence Data from the CNDDB

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

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Colusa (COL), Glenn (GLE), Lake (LAK), Napa (NAP), Yolo (YOL)
Quads: Name (Quad Code)
Benmore Canyon (3912215), Brooks (3812262), Esparto (3812261), Glascock Mtn. (3812283), Guinda (3812272), Jericho Valley (3812274), Knoxville (3812273), Lake Berryessa (3812252), Lodoga (3912234), Lower Lake (3812285), Monticello Dam (3812251), Rail Canyon (3912244), Rumsey (3812282), Walter Springs (3812263), Wilbur Springs (3912214), Wilson Valley (3812284), Winters (3812158)
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

CNPS Status Review: CRPR List Change on 2014-12-15

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Suggested Citation:
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].
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