Taxon Report
Carex arcta Boottnorthern clustered sedge |
 Copyright © 2006 Dean Wm. Taylor |
Taxon Summary
Carex arcta, commonly known as northern clustered sedge, is a perennial herb in the Cyperaceae that is found in California and elsewhere. It occurs within Bogs and fens, and North Coast coniferous forest (mesic), growing at elevations from 60 to 1400 meters. Carex arcta is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Carex arcta Boott |
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Common Name: |
northern clustered sedge |
| Family: | Cyperaceae |
| Element Code: | PMCYP030X0 |
| USDA Plants Symbol: | CAAR2 |
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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: | 60-1400 (195-4595) |
| General Habitats: | Bogs and fens, North Coast coniferous forest |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.2 |
| Global Rank: | G5 |
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State Rank: |
S1 |
| State List: | None |
| Fed List: | None |
| Other Status: | IUCN_LC |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 13 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 2 |
| Fair (C) | 5 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 5 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Del Norte (DNT), Humboldt (HUM) | |
| Quads: Name (Quad Code) | |
| Arcata North (4012481), Board Camp Mtn. (4012366), Crescent City (4112472), Eureka (4012472), Garberville (4012317), Lord-ellis Summit (4012387), Mad River Buttes (4012367), Maple Creek (4012377), Owl Creek (4012358), Redcrest (4012348) | |
Threat List Data from the CNDDB
| Threat List Total: | 6 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 8 | 62 % | |
| Logging | 7 | 53% |
| Other | 3 | 23% |
| Road/trail construction/maint. | 2 | 15% |
| Foot traffic/trampling | 2 | 15% |
| Grazing | 1 | 7% |
| Altered flood/tidal/hydrologic regime | 1 | 7% |
Selected References
| Carex arcta profile for potential Species of Conservation Concern evaluation (2018) |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 19 November 2025].