Taxon Report
Ivesia aperta (J.T. Howell) Munz var. apertaSierra Valley ivesia |
 © 2008 Steve Matson |
Taxon Summary
Ivesia aperta var. aperta, commonly known as Sierra Valley ivesia, is a perennial herb in the Rosaceae that is found in California and elsewhere. It occurs within Great Basin scrub, Lower montane coniferous forest, Meadows and seeps, Pinyon and juniper woodland, and Vernal pools, growing at elevations from 1480 to 2300 meters. Ivesia aperta var. aperta is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Ivesia aperta (J.T. Howell) Munz var. aperta |
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Common Name: |
Sierra Valley ivesia |
| Family: | Rosaceae |
| Element Code: | PDROS0X011 |
| USDA Plants Symbol: | IVAPA |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Jun-Sep | Jun-Sep |
| Elevation: | 1480-2300 (4855-7545) |
| General Habitats: | Great Basin scrub, Lower montane coniferous forest, Meadows and seeps, Pinyon and juniper woodland, Vernal pools |
| Microhabitat: | Vernally Mesic, Volcanic (usually) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2G3T2T3 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_UCSC; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 50 |
| Element Occurrence Ranks: | |
| Excellent (A) | 8 |
| Good (B) | 11 |
| Fair (C) | 14 |
| Poor (D) | 4 |
| None (X) | 1 |
| Unknown (U) | 12 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Lassen (LAS), Plumas (PLU), Sierra (SIE) | |
| Quads: Name (Quad Code) | |
| Antelope Valley (3912063), Chilcoot (3912072), Evans Canyon (3912061), Ferris Creek (4012013), Frenchman Lake (3912082), Loyalton (3912062), McKesick Peak (4012012), Portola (3912074), Reconnaissance Peak (3912073), Sardine Peak (3912052) | |
Threat List Data from the CNDDB
| Threat List Total: | 16 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 42 | 84 % | |
| Grazing | 26 | 52% |
| Road/trail construction/maint. | 12 | 24% |
| Other | 7 | 14% |
| Agriculture | 6 | 12% |
| Development | 5 | 10% |
| Improper burning regime | 4 | 8% |
| Erosion/runoff | 4 | 8% |
| ORV activity | 4 | 8% |
| Non-native plant impacts | 3 | 6% |
| Foot traffic/trampling | 3 | 6% |
| Recreational use (non-ORV) | 3 | 6% |
| Logging | 2 | 4% |
| Mining | 1 | 2% |
| Disking | 1 | 2% |
| Dam/Inundation | 1 | 2% |
| Vandalism/dumping/litter | 1 | 2% |
Notes
| Threatened by residential development, agriculture, grazing, and vehicles. Potentially threatened by hydrological alterations and fire suppression. Interim management guide prepared by USFS in 1992. Threatened in NV. See Leaflets of Western Botany 9(15):239 (1962) for original description, and Brittonia 40(4):398-399 (1988) for revised nomenclature. |
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Threats: |
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Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 20 October 2025].