Taxon Report
Adiantum shastense Huiet & A.R. Sm.Shasta maidenhair fern |
 ©2015 Julie Kierstead |
Taxon Summary
Adiantum shastense, commonly known as Shasta maidenhair fern, is a perennial herb in the Pteridaceae that is found only in California. It occurs within Lower montane coniferous forest, growing at elevations from 330 to 1535 meters. Adiantum shastense is ranked 4.3, Plants of Limited Distribution, A Watch List; Not very threatened in California.Classification
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Scientific Name: |
Adiantum shastense Huiet & A.R. Sm. |
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Common Name: |
Shasta maidenhair fern |
| Family: | Pteridaceae |
| Element Code: | PPADI030W0 |
| USDA Plants Symbol: | ADSH |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Apr-Aug | Apr-Aug |
| Elevation: | 330-1535 (1085-5035) |
| General Habitats: | Lower montane coniferous forest |
| Microhabitat: | Carbonate (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 4.3 |
| Global Rank: | G3 |
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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: | 0 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Shasta (SHA) | |
| Quads: Name (Quad Code) | |
| Big Bend (4112118), Bohemotash Mtn. (4012274), Bollibokka Mtn. (4012282), Chalk Mtn. (4012187), Chicken Hawk Hill (4112214), Devils Rock (4012271), Girard Ridge (4112222), Goose Gap (4012281), Hanland Peak (4012283), Lake McCloud (4112221), Lamoine (4012284), Minnesota Mtn. (4012272), Montgomery Creek (4012178), Oak Run (4012261), O'Brien (4012273), Project City (4012263), Roaring Creek (4012188), Shasta Dam (4012264), Tombstone Mtn. (4112213), Yellowjacket Mtn. (4112212) | |
Threat List Data from the CNDDB
| Threat List Total: | 0 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 0 | 0 % | |
Notes
| Originally identified as A. jordanii and also similar to A. capillus-veneris; distinguished from these species in having diamond shaped pinnules and by its perennial habit, with the presence of old fronds underlying its fresh fronds. See PhytoKeys 53:73-81 (2015) for original description. |
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Threats: |
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Taxonomy: |
Selected References
| Proposed Addition to California Rare Plant Rank 4.3, G3 / S3 (2016) |
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].