Species Details

Malacothamnus hallii

Hall's bushmallow

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Species Description:

Malacothamnus hallii, commonly known as Hall's bushmallow, is a perennial deciduous shrub in the Malvaceae that is found only in California. It occurs within Chaparral, and Coastal scrub, growing at elevations from 10 to 760 meters. Malacothamnus hallii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Malacothamnus hallii (Eastw.) Kearn.
Common Name: Hall's bushmallow
Family:	Malvaceae
Element Code:	PDMAL0Q0F0
USDA Plants Symbol:
Synonyms/Other Names:
Name Status:	JEP, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	BLM_S; SB_CalBG/RSABG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2024-06-04

Ecology and Life History

Lifeform: perennial deciduous shrub

Blooming Period: (Apr)May-Sep(Oct)

Elevation:
10 - 760 meters
35 - 2495 feet

General Habitats:

Chaparral
Coastal scrub

Microhabitat Details:

Microhabitat:

Notes

Notes:
Threats: Threatened by development. Possibly threatened by non-native plants, and road maintenance.
Taxonomy: A synonym of M. fasciculatus in TJM (1993).

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	12
	Total EOs	% of EOs
EOs with Threat Listed:	24	33 %
Grazing	8	10%
Other	6	8%
Road/trail construction/maint.	6	8%
Non-native plant impacts	4	5%
Development	3	4%
Erosion/runoff	2	2%
Feral pigs	2	2%
ORV activity	2	2%
Improper burning regime	2	2%
Foot traffic/trampling	1	1%
Dam/Inundation	1	1%
Recreational use (non-ORV)	1	1%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					73
A	B	C	D	X	U
3	9	8	2	1	50

Occurrence Status:
Historical >20 Years	15
Recent <=20 Years	58

Presence:
Presumed Extant	72
Possibly Extirpated	1
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Contra Costa (CCA), Merced (MER), Santa Clara (SCL), Stanislaus (STA)

Quads: Name (Quad Code)
Antioch South (3712187), Calaveras Reservoir (3712147), Clayton (3712188), Diablo (3712178), Loma Prieta (3712117), Lone Tree Creek (3712154), Los Banos Valley (3612181), Milpitas (3712148), Mississippi Creek (3712124), Morgan Hill (3712126), Mustang Peak (3712123), Pacheco Pass (3712112), Pacheco Peak (3712113), San Jose East (3712137), San Jose West (3712138), Santa Teresa Hills (3712127), Solyo (3712153), Three Sisters (3612183), Walnut Creek (3712281)

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

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CNPS Rare Plant Inventory