Taxon Report
Muhlenbergia arsenei Hitchc.tough muhly |
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Taxon Summary
Muhlenbergia arsenei, commonly known as tough muhly, is a perennial rhizomatous herb in the Poaceae that is found in California and elsewhere. It occurs within Pinyon and juniper woodland (carbonate, and rocky), growing at elevations from 1400 to 1860 meters. Muhlenbergia arsenei 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: |
Muhlenbergia arsenei Hitchc. |
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Common Name: |
tough muhly |
| Family: | Poaceae |
| Element Code: | PMPOA48060 |
| USDA Plants Symbol: | MUAR4 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial rhizomatous herb |
| Blooming Period: Aug-Oct | Aug-Oct |
| Elevation: | 1400-1860 (4595-6105) |
| General Habitats: | Pinyon and juniper woodland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.3 |
| Global Rank: | G5 |
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State Rank: |
S2? |
| 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: | 6 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 1 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 5 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| San Bernardino (SBD) | |
| Quads: Name (Quad Code) | |
| Clark Mtn. (3511555), Ivanpah (3511533), Mescal Range (3511545), Pinto Valley (3511523) | |
Threat List Data from the CNDDB
| Threat List Total: | 4 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 1 | 17 % | |
| Development | 1 | 16% |
| Logging | 1 | 16% |
| Mining | 1 | 16% |
| ORV activity | 1 | 16% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 28 October 2025].