Taxon Report

Malacothamnus palmeri (S. Watson) Greene var. lucianus Kearney

Arroyo Seco bushmallow

Print Report

Taxon Summary

Malacothamnus palmeri var. lucianus is a synonym of Malacothamnus lucianus (Kearney) K. Morse .

Classification


Scientific Name:	Malacothamnus palmeri (S. Watson) Greene var. lucianus Kearney
Common Name:	Arroyo Seco bushmallow
Family:
Element Code:	PDMAL0Q0B2
USDA Plants Symbol:
Synonyms/Other Names:	Malacothamnus lucianus (Kearney) K. Morse

Ecology and Life History


Lifeform:
Blooming Period:
Elevation:	- (-)
General Habitats:
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:
Global Rank:	G1Q
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_CalBG/RSABG; SB_SBBG; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	9
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	3
Fair (C)	0
Poor (D)	2
None (X)	0
Unknown (U)	4

Location


California Endemic: False
California Counties and Islands: Name (Code)

Quads: Name (Quad Code)

Threat List Data from the CNDDB


Threat List Total:	6
EOs with Threat Listed:	Total EOs	% of EOs
	4	44 %
Altered flood/tidal/hydrologic regime	1	11%
Erosion/runoff	1	11%
Grazing	1	11%
Non-native plant impacts	1	11%
Other	1	11%
Road/trail construction/maint.	1	11%

Notes




Threats:

Taxonomy:

Selected References

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 October 2025].