Taxon Report
Penstemon bicolor (Bdg.) Clokey & Keck ssp. roseus Clokey & Keckrosy two-toned beardtongue |
 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
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Scientific Name: |
Penstemon bicolor (Bdg.) Clokey & Keck ssp. roseus Clokey & Keck |
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Common Name: |
rosy two-toned beardtongue |
| Family: | Plantaginaceae |
| Element Code: | PDSCR1L0S2 |
| USDA Plants Symbol: | PEBIR |
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Synonyms/Other Names: |
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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 |
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State Rank: |
S1 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG |
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CRPR Changes: |
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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 |
| 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. |
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Threats: |
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Threatened by mining, renewable energy development, and hybridization with Penstemon palmeri |
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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 13 November 2025].