Taxon Report
Carex sheldonii Mkze.Sheldon's sedge |
 ©2015 Steve Matson |
Taxon Summary
Carex sheldonii, commonly known as Sheldon's sedge, is a perennial rhizomatous herb in the Cyperaceae that is found in California and elsewhere. It occurs within Lower montane coniferous forest (mesic), Marshes and swamps (freshwater), and Riparian scrub, growing at elevations from 1200 to 2012 meters. Carex sheldonii 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 sheldonii Mkze. |
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Common Name: |
Sheldon's sedge |
| Family: | Cyperaceae |
| Element Code: | PMCYP03CE0 |
| USDA Plants Symbol: | CASH |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial rhizomatous herb |
| Blooming Period: May-Aug | May-Aug |
| Elevation: | 1200-2012 (3935-6600) |
| General Habitats: | Lower montane coniferous forest, Marshes and swamps, Riparian scrub |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.2 |
| Global Rank: | G4 |
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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: | 48 |
| Element Occurrence Ranks: | |
| Excellent (A) | 3 |
| Good (B) | 10 |
| Fair (C) | 6 |
| Poor (D) | 1 |
| None (X) | 1 |
| Unknown (U) | 27 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Lassen (LAS), Modoc (MOD), Placer (PLA), Plumas (PLU) | |
| Quads: Name (Quad Code) | |
| Adin (4112028), Alturas (4112045), Antelope Lake (4012025), Babcock Peak (4012015), Big Swamp (4112121), Blairsden (3912075), Caribou (4012112), Cold Spring Mtn. (4112013), Crescent Mills (4012018), Crocker Mtn. (3912084), Donica Mtn. (4112132), Dutch Flat (3912027), Genesee Valley (4012016), Greenville (4012028), Grizzly Valley (3912085), Halls Canyon (4112131), Infernal Caverns (4112035), Janesville (4012035), Jess Valley (4112023), Johnsville (3912076), Kettle Rock (4012026), Lane Reservoir (4112017), Likely (4112025), Portola (3912074), Soup Creek (4112033), Susanville (4012046), Westwood East (4012038) | |
Threat List Data from the CNDDB
| Threat List Total: | 13 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 35 | 73 % | |
| Grazing | 14 | 29% |
| Non-native plant impacts | 12 | 25% |
| Road/trail construction/maint. | 11 | 22% |
| Other | 5 | 10% |
| ORV activity | 3 | 6% |
| Altered flood/tidal/hydrologic regime | 2 | 4% |
| Dam/Inundation | 2 | 4% |
| Development | 2 | 4% |
| Recreational use (non-ORV) | 2 | 4% |
| Erosion/runoff | 1 | 2% |
| Foot traffic/trampling | 1 | 2% |
| Degraded water quality | 1 | 2% |
| Logging | 1 | 2% |
Selected References
| Carex sheldonii account for potential Species of Conservation Concern evaluation (2022) |
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].