Taxon Report

Phaseolus filiformis Benth.

slender-stem bean

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Taxon Summary

Phaseolus filiformis, commonly known as slender-stem bean, is a annual herb in the Fabaceae that is found in California and elsewhere. It occurs within Sonoran desert scrub, growing at elevations from 125 to 125 meters. Phaseolus filiformis is ranked 2B.1, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Phaseolus filiformis Benth.
Common Name:	slender-stem bean
Family:	Fabaceae
Element Code:	PDFAB330P0
USDA Plants Symbol:	PHFI3
Synonyms/Other Names:	Phaseolus wrightii Gray

Ecology and Life History


Lifeform:	annual herb
Blooming Period: Apr	Apr
Elevation:	125-125 (410-410)
General Habitats:	Sonoran desert scrub
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.1
Global Rank:	G5
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	IUCN_LC
CRPR Changes:	changed from 2.1 to 2B.1 on 2013-06-12 changed from 2.3 to 2.1 on 2010-03-09

Occurrence Data from the CNDDB


Total Occurrences:	1
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	0
Fair (C)	0
Poor (D)	0
None (X)	0
Unknown (U)	1

Location


California Endemic: False
California Counties and Islands: Name (Code)
Riverside (RIV)
Quads: Name (Quad Code)
Valerie (3311652)

Threat List Data from the CNDDB


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

Notes



Known in CA from only one occurrence in the Coachella Valley.
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 13 February 2025].