Taxon Report
Pholistoma auritum (Lindl.) Lilja var. arizonicum (Jones) Const.Arizona pholistoma |
 © 2017 Keir Morse |
Taxon Summary
Pholistoma auritum var. arizonicum, commonly known as Arizona pholistoma, is a annual herb in the Hydrophyllaceae that is found in California and elsewhere. It occurs within Mojavean desert scrub, and Sonoran desert scrub, growing at elevations from 275 to 835 meters. Pholistoma auritum var. arizonicum is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.Classification
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Scientific Name: |
Pholistoma auritum (Lindl.) Lilja var. arizonicum (Jones) Const. |
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Common Name: |
Arizona pholistoma |
| Family: | Hydrophyllaceae |
| Element Code: | PDHYD0D011 |
| USDA Plants Symbol: | PHAUA |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Mar | Mar |
| Elevation: | 275-835 (900-2740) |
| General Habitats: | Mojavean desert scrub, Sonoran desert scrub |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.3 |
| Global Rank: | G5T4? |
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State Rank: |
S3 |
| 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: | 23 |
| Element Occurrence Ranks: | |
| Excellent (A) | 4 |
| Good (B) | 2 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 17 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Imperial (IMP), San Bernardino (SBD), San Diego (SDG) | |
| Quads: Name (Quad Code) | |
| Chemehuevi Peak (3411455), Earthquake Valley (3311614), In-ko-pah Gorge (3211661), Jacumba (3211662), Mohawk Spring (3411447), Monument Peak (3211684), Mt. Manchester (3511416), Whale Peak (3311613), Whipple Mts. SW (3411434), Whipple Wash (3411433) | |
Threat List Data from the CNDDB
| Threat List Total: | 4 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 4 | 17 % | |
| Foot traffic/trampling | 3 | 13% |
| ORV activity | 3 | 13% |
| Vandalism/dumping/litter | 2 | 8% |
| Other | 1 | 4% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 22 October 2025].