Home/Species/ Threadleaf Beardtongue

Penstemon filiformis

(Keck) Keck

Threadleaf Beardtongue

G4Apparently Secure Found in 7 roadless areas NatureServe Explorer →

G4Apparently SecureGlobal Rank

MediumThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.143000

Element CodePDSCR1L2A0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single state or province

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderPlantaginales

FamilyPlantaginaceae

GenusPenstemon

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

Rank Method Rank calculation - Biotics v2

Review Date2022-05-17

Change Date2020-05-21

Edition Date2022-05-17

Edition AuthorsJoyal, E.(1988), rev. D. Gries, rev. K. Gravuer (2009), rev. Lazar (2020), rev. Treher (2022)

Threat ImpactMedium

Range Extent1000-5000 square km (about 400-2000 square miles)

Number of Occurrences81 - 300

Rank Reasons

Endemic to California, Penstemon filiformis is a perennial herb that has a narrow range but is considered common and abundant within its habitat which crosses three counties (Shasta, Siskiyou, and Trinity). Approximately half of the occurrences presumed extant are on U.S. Forest Service lands and half are on private lands, much of which is owned by the timber industry. It is possibly threatened by logging and recreational activities.

Range Extent Comments

Penstemon filiformis is endemic to California and occurring in the Sacramento River Valley in the Klamath Ranges of Shasta, Siskiyou, and Trinity Counties.

Occurrences Comments

This species is common and abundant within its range (Ferguson, pers. comm., 2022).

Threat Impact Comments

This taxon is potentially threatened by logging and recreational activities.

Ecology & Habitat

Habitat

This species grows in open rocky gulches & flats with in lower montane coniferous forest, yellow pine forest, & cismontane woodlands at elevations of 180 to 2,135 m (CNDDB 2022, Jepson Flora Project 2022).

Terrestrial Habitats

Forest/WoodlandForest - ConiferShrubland/chaparral

Other Nations (1)

United StatesN4

Province	Rank	Native
California	S4	Yes

Threat Assessments

Threat	Scope	Severity	Timing
5 - Biological resource use	Unknown	Unknown	High (continuing)
5.3 - Logging & wood harvesting	Unknown	Unknown	High (continuing)
6 - Human intrusions & disturbance	Large (31-70%)	Unknown	High (continuing)
6.1 - Recreational activities	Large (31-70%)	Unknown	High (continuing)

Plant Characteristics

DurationPERENNIAL

Economic Value (Genus)No

Roadless Areas (7)

California (7)

Area	Forest	Acres
Bonanza King	Shasta-Trinity National Forest	16,402
Mt. Shasta A	Shasta-Trinity National Forest	676
Mt. Shasta C	Shasta-Trinity National Forest	292
Slate Creek	Shasta-Trinity National Forest	6,636
South Fork	Shasta-Trinity National Forest	16,786
Weaver Bally	Shasta-Trinity National Forest	829
West Girard	Shasta-Trinity National Forest	37,516

References (5)

California Natural Diversity Database (CNDDB). 2022. RareFind Version 5.2.14. California Department of Fish and Game, Sacramento.
Ferguson, Katie. Personal communication. Rare Plant Botanist. California Natural Diversity Database, Department of Fish and Wildlife, Sacramento.
Jepson Flora Project (eds.) 2022. Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/ (accessed 2022).
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.
Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.

Penstemon filiformis

Habitat

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