Taxon Report
Phacelia peirsoniana J.T. HowellPeirson's phacelia |
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Taxon Summary
Phacelia peirsoniana, commonly known as Peirson's phacelia, is a annual herb in the Hydrophyllaceae that is found in California and elsewhere. It occurs within Great Basin scrub, and Pinyon and juniper woodland, growing at elevations from 1370 to 2700 meters. Phacelia peirsoniana is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.Classification
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Scientific Name: |
Phacelia peirsoniana J.T. Howell |
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Common Name: |
Peirson's phacelia |
| Family: | Hydrophyllaceae |
| Element Code: | PDHYD0C3N0 |
| USDA Plants Symbol: | PHPE2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: May-Aug | May-Aug |
| Elevation: | 1370-2700 (4495-8860) |
| General Habitats: | Great Basin scrub, Pinyon and juniper woodland |
| Microhabitat: | Carbonate, Rocky |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 4.3 |
| Global Rank: | G4 |
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State Rank: |
S4 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 0 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Inyo (INY) | |
| Quads: Name (Quad Code) | |
| Last Chance Mtn. (3711736), Tin Mountain (3611784) | |
Threat List Data from the CNDDB
| Threat List Total: | 0 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 0 | 0 % | |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 4 November 2025].