Taxon Report
Penstemon filiformis (Keck) Keckthread-leaved beardtongue |
 Steve Matson (2015) |
Classification
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Scientific Name: |
Penstemon filiformis (Keck) Keck |
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Common Name: |
thread-leaved beardtongue |
| Family: | Plantaginaceae |
| Element Code: | PDSCR1L2A0 |
| USDA Plants Symbol: | PEFI2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: May-Aug(Sep) | May-Aug(Sep) |
| Elevation: | 450-1875 (1475-6150) |
| General Habitats: | Cismontane woodland, Lower montane coniferous forest |
| Microhabitat: | Rocky, Serpentine (often) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 4.2 |
| Global Rank: | G4 |
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State Rank: |
S4 |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_UCSC |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 95 |
| Element Occurrence Ranks: | |
| Excellent (A) | 7 |
| Good (B) | 45 |
| Fair (C) | 12 |
| Poor (D) | 1 |
| None (X) | 0 |
| Unknown (U) | 30 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Shasta (SHA), Siskiyou (SIS), Trinity (TRI) | |
| Quads: Name (Quad Code) | |
| Caribou Lake (4112218), Carrville (4112216), Chicken Hawk Hill (4112214), Covington Mill (4012287), Damnation Peak (4012285), Dunsmuir (4112223), Lamoine (4012284), Mumbo Basin (4112225), Papoose Creek (4012276), Rush Creek Lakes (4012278), Schell Mtn. (4012275), Seven Lakes Basin (4112224), Siligo Peak (4012288), Tangle Blue Lake (4112226), Tombstone Mtn. (4112213), Trinity Center (4012286), Trinity Dam (4012277), Whisky Bill Peak (4112215), Ycatapom Peak (4112217) | |
Threat List Data from the CNDDB
| Threat List Total: | 10 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 67 | 71 % | |
| Logging | 49 | 51% |
| Road/trail construction/maint. | 29 | 30% |
| Other | 7 | 7% |
| Improper burning regime | 4 | 4% |
| Insufficient population/stand size | 3 | 3% |
| Grazing | 2 | 2% |
| Development | 1 | 1% |
| Erosion/runoff | 1 | 1% |
| Recreational use (non-ORV) | 1 | 1% |
| Non-native plant impacts | 1 | 1% |
Notes
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Changed from 1B.3 to 4.2 on 2020-05-07 More common than originally known. Possibly threatened by logging, road maintenance, and recreation. Reported to tolerate some types of disturbance. Confused with P. laetus var. sagittatus. See University of California Publications in Botany 16:394 (1932) for original description.
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Threats: |
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Taxonomy: |
Selected References
| CRPR List Change on 2020-05-07 |
| USFS Potential Species of Conservation Concern Profile |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 7 January 2025].