Taxon Report
Juncus digitatus C. Witham & Zikafinger rush |
 Image by Wendy Boes |
Taxon Summary
Juncus digitatus, commonly known as finger rush, is a annual herb in the Juncaceae that is found only in California. It occurs within Cismontane woodland (openings), Lower montane coniferous forest (openings), and Vernal pools (xeric), growing at elevations from 660 to 1097 meters. Juncus digitatus is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Juncus digitatus C. Witham & Zika |
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Common Name: |
finger rush |
| Family: | Juncaceae |
| Element Code: | PMJUN013E0 |
| USDA Plants Symbol: | JUDI3 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: (Apr)May-Jun | (Apr)May-Jun |
| Elevation: | 660-1097 (2165-3600) |
| General Habitats: | Cismontane woodland, Lower montane coniferous forest, Vernal pools |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| 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: | 3 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 2 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Nevada (NEV), Shasta (SHA) | |
| Quads: Name (Quad Code) | |
| Grass Valley (3912121), Hagaman Gulch (4012157), Shingletown (4012148) | |
Threat List Data from the CNDDB
| Threat List Total: | 5 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 3 | 100 % | |
| Altered flood/tidal/hydrologic regime | 1 | 33% |
| Development | 1 | 33% |
| Disking | 1 | 33% |
| Mining | 1 | 33% |
| Surface water diversion | 1 | 33% |
Notes
| Two occurrences in SHA Co.; one occurrence is threatened by ornamental rock mining and the other is threatened by water diversion. A third occurrence in NEV Co. is threatened by development and hydrological alterations. See J. Botanical Research Institute of Texas 2(2):775-781 (2008) for original description. |
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Threats: |
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Taxonomy: |
Selected References
| CRPR List Addition on 2009-01-02 |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].