Taxon Report

Penstemon bicolor (Bdg.) Clokey & Keck ssp. roseus Clokey & Keck

rosy two-toned beardtongue

Print Report

James M. Andre 2010

Taxon Summary

Penstemon bicolor ssp. roseus, commonly known as rosy two-toned beardtongue, is a perennial herb in the Plantaginaceae that is found in California and elsewhere. It occurs within Joshua tree "woodland", and Mojavean desert scrub, growing at elevations from 700 to 1500 meters. Penstemon bicolor ssp. roseus is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification


Scientific Name:	Penstemon bicolor (Bdg.) Clokey & Keck ssp. roseus Clokey & Keck
Common Name:	rosy two-toned beardtongue
Family:	Plantaginaceae
Element Code:	PDSCR1L0S2
USDA Plants Symbol:	PEBIR
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May	May
Elevation:	700-1500 (2295-4920)
General Habitats:	Joshua tree "woodland", Mojavean desert scrub
Microhabitat:	Disturbed areas (sometimes), Gravelly (sometimes), Rocky (sometimes)
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.1
Global Rank:	G3T3Q
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_CalBG/RSABG
CRPR Changes:	changed from 2.3 to 1B.1 on 2009-12-08

Occurrence Data from the CNDDB


Total Occurrences:	9
Element Occurrence Ranks:
Excellent (A)	0
Good (B)	1
Fair (C)	1
Poor (D)	1
None (X)	0
Unknown (U)	6

Location


California Endemic: False
California Counties and Islands: Name (Code)
San Bernardino (SBD)
Quads: Name (Quad Code)
Hart Peak (3511531), Homer Mtn. (3511418)

Threat List Data from the CNDDB


Threat List Total:	5
EOs with Threat Listed:	Total EOs	% of EOs
	6	67 %
ORV activity	3	33%
Development	2	22%
Grazing	2	22%
Mining	2	22%
Non-native animal impacts	1	11%

Notes



Threatened by mining, renewable energy development, and hybridization with Penstemon palmeri. See Bulletin of the Southern California Academy of Sciences 38(1):8 (1939) for original description.
Threats:
Threatened by mining, renewable energy development, and hybridization with Penstemon palmeri.
Taxonomy:

Selected References

CRPR List Change on 2009-12-08

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 January 2025].