Home/Species/ Two-color Beardtongue

Penstemon bicolor

(Brandeg.) Clokey & Keck

Two-color Beardtongue

G3Vulnerable Found in 2 roadless areas NatureServe Explorer →

G3VulnerableGlobal Rank

MediumThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.142998

Element CodePDSCR1L0S0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderPlantaginales

FamilyPlantaginaceae

GenusPenstemon

Other Common Names

Pinto Beardtongue (EN) pinto beardtongue (EN)

Concept Reference

Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

Conservation Status

Review Date2009-12-23

Change Date2009-12-23

Edition Date2008-05-05

Edition AuthorsGravuer, K.

Threat ImpactMedium

Range Extent5000-20,000 square km (about 2000-8000 square miles)

Number of Occurrences21 - 300

Rank Reasons

Found predominantly in Clark County, NV, with scattered occurrences in adjacent counties (Mojave [AZ], San Bernardino [CA], Nye [NV]). Approximately 86 occurrences are currently estimated. Expansion of urban Las Vegas is the most significant threat, and primarily threatens ssp. bicolor; at least 6, and possibly more, occurrences of this subspecies have already been extirpated. Road work and herbicide use present less significant threats.

Range Extent Comments

Range extent is approximately 14,000 square km. Predominantly occurs in Clark County, NV, with some occurrences in adjacent Mojave County, AZ and a few in adjacent San Bernardino County, CA and Nye County, NV.

Occurrences Comments

Approximately 86 occurrences are estimated, predominantly in Nevada, with some (approx. 10) in adajacent Arizona and a few (approx. 3) in adjacent California.

Threat Impact Comments

Development associated with the expansion of urban Las Vegas is the most significant threat, and primarily threatens ssp. bicolor. Some occurrences of both varieties are found on roadsides, where road work and herbicide use present less significant potential threats.

Ecology & Habitat

Habitat

Shallow gravelly washes and roadsides below 1700 m elevation.

Terrestrial Habitats

Bare rock/talus/scree

Other Nations (1)

United StatesN3

Province	Rank	Native
California	SNR	Yes
Nevada	S3	Yes
Arizona	S2	Yes

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (2)

Nevada (2)

Area	Forest	Acres
Lovell Summit South	Humboldt-Toiyabe National Forest	28,455
Potosi	Humboldt-Toiyabe National Forest	5,145

References (4)

Kartesz, J.T. 1988. A flora of Nevada. Ph.D. dissertation. Univ. of Nevada, Reno. 3 volumes. 1729 pp.
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Mozingo, H.N., and M. Williams. 1980. The threatened and endangered plants of Nevada. U.S. Fish and Wildlife Service and Bureau of Land Management, Portland, OR. 268 pp.
Weixelman, D., and D. Atwood. 1990. Toiyabe National Forest sensitive plants field guide. U.S. Forest Service, Intermountain Region, Ogden, UT. 123 pp.