Species Details

Malacothamnus davidsonii

Davidson's bushmallow

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Classification

Scientific Name: Malacothamnus davidsonii (Rob.) Greene
Common Name: Davidson's bushmallow
Family:	Malvaceae
Element Code:	PDMAL0Q0V0
USDA Plants Symbol:	MADA
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	GNR
State Rank:	S2
Other Status:	SB_CalBG/RSABG
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2024-12-03

Ecology and Life History

Lifeform: perennial deciduous shrub

Blooming Period: Jun-Jan

Elevation:
185 - 1140 meters
605 - 3740 feet

General Habitats:

Chaparral
Cismontane woodland
Coastal scrub
Riparian woodland

Microhabitat Details:

Microhabitat:

Notes

Notes:
Threats: Threatened by development, erosion/runoff, foot traffic/trampling, herbicides, improper burning regime, non-native plant impacts, ORV activity, road/trail construction/maintenance, vandalism/dumping/litter, waterway bank protection/maintenance, wood cutting or brush clearing.
Taxonomy: Formerly included populations from Monterey and San Luis Obispo counties that are now treated as M. discombobulatus; the two species are allopatric and genetically distinct. May intergrade with M. fasciculatus; see Madroño 46(4): 142-152 (1999) for information.

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	12
	Total EOs	% of EOs
EOs with Threat Listed:	29	55 %
Other	16	30%
Road/trail construction/maint.	13	24%
Wood cutting or brush clearing	9	16%
Development	8	15%
Non-native plant impacts	6	11%
ORV activity	6	11%
Foot traffic/trampling	5	9%
Erosion/runoff	3	5%
Biocides	2	3%
Improper burning regime	1	1%
Vandalism/dumping/litter	1	1%
Waterway bank protection/maintenance	1	1%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					53
A	B	C	D	X	U
6	9	11	1	1	25

Occurrence Status:
Historical >20 Years	11
Recent <=20 Years	42

Presence:
Presumed Extant	52
Possibly Extirpated	0
Presumed Extirpated	1

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)

Quads: Name (Quad Code)

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

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Presumed Extant

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CNPS Rare Plant Inventory