CNPS Inventory Plant Detail

Malacothamnus davidsonii

Common Name:	Davidson's bush-mallow
Family:	Malvaceae
Synonyms:
Element Code:	PDMAL0Q040
Full Name:	Malacothamnus davidsonii (Rob.) Greene
USDA PLANTS Symbol:	MADA

Biology
Lifeform: perennial deciduous shrub Blooming Period: June - January Habitat: • Chaparral • Cismontane woodland • Coastal scrub • Riparian woodland

Rarity Status
Rare Plant Rank: 1B.2 Rare, threatened, or endangered in California and elsewhere .2: Fairly endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S2 S2: Imperiled. Global Rank: G2 G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 56
Element Occurrence Ranks:

A B C D X U

1 8 7 1 2 37

Population Status:

Historic >20 yrs	Recent <=20 yrs
28	28

Presence:

Present Extant	Possibly Extirpated	Extirpated
54	1	1

Notes
Threatened by urbanization in LAX Co. Potentially threatened by maintenance activities and erosion. Intergrades with M. fasciculatus; see Madroño 46(3):142-152 (1999) for information. To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page. Date Added: 1974-01-01 Last Update: 2010-11-17

Location

Elevation: 185 - 855 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Kern (KRN), Los Angeles (LAX), Monterey (MNT), Santa Barbara (SBA), Santa Clara (SCL), San Luis Obispo (SLO), San Mateo (SMT), Ventura (VEN)

Quads: name (DWR code) USGS code
Burbank (111A) 34118B3, Van Nuys (111B) 34118B4, Condor Peak (136C) 34118C2, San Fernando (137C) 34118C4, Sunland (137D) 34118C3, Lockwood Valley (165A) 34119F1, Wheeler Springs (166D) 34119E3, Cuyama Peak (191C) 34119G4, Apache Canyon (191D) 34119G3, Tierra Redonda Mountain (294C) 35120G8, Bradley (294D) 35120G7, Williams Hill (295A) 35121H1, Jolon (295B) 35121H2, Burnett Peak (295C) 35121G2, Bryson (295D) 35121G1, Thompson Canyon (318B) 36121B2, Cosio Knob (318C) 36121A2, Bear Canyon (319D) 36121A3, Sycamore Flat (342C) 36121C4, Palo Alto (428B) 37122D2, Mindego Hill (428C) 37122C2, Woodside (429A) 37122D3, Montara Mountain (448C) 37122E4, San Mateo (448D) 37122E3

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

1062

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora Consortium of California Herbaria CalPhotos California Department of Fish and Wildlife: CNDDB Quick Viewer

Suggested Citation
CNPS, Rare Plant Program. . Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. Website http://www.rareplants.cnps.org [accessed ].

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