Species Details

Rhynchospora alba

white beaked-rush

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Photo of Rhynchospora alba
© 2021 Scot Loring
Photo of Rhynchospora alba
© 2006 Dean Wm. Taylor
Photo of Rhynchospora alba
© 2017 Dean Wm. Taylor
Scientific Name:
Rhynchospora alba (L.) Vahl
Common Name:
white beaked-rush
Family: Cyperaceae
Element Code: PMCYP0N010
USDA Plants Symbol: RHAL3
Synonyms/Other Names:
CA Rare Plant Rank: 2B.2
Fed List: None
State List: None
Global Rank: G5
State Rank:
Other Status: IUCN_LC
CRPR Changes:
changed from 2.2 to 2B.2 on 2013-06-12
Add Date: 1974-01-01
Date Edited: 2021-07-14
Lifeform: perennial rhizomatous herb
Blooming Period: Jun-Aug
60 - 2040 meters
195 - 6695 feet
General Habitats:
  • Bogs and fens
  • Meadows and seeps
  • Marshes and swamps (freshwater)
Microhabitat Details:
Does plant occur in DNT, INY, or MPA counties? Threatened by grazing, trampling, and hydrological alterations. Endangered in ID, and on review list in OR.
Threat List Total: 8
Total EOs % of EOs
EOs with Threat Listed: 6 35 %
Foot traffic/trampling 2 11%
Altered flood/tidal/hydrologic regime 2 11%
Biocides 1 5%
Grazing 1 5%
Non-native plant impacts 1 5%
Total Occurrences: 17
Element Occurrence Ranks:
5 3 0 0 0 9
Occurrence Status:
Historical >20 Years 6
Recent <=20 Years 11
Presumed Extant 17
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
Alabama (AL), Alaska (AK), California (CA), Connecticut (CT), Delaware (DE), District of Columbia (DC), Georgia (GA), Idaho (ID), Illinois (IL), Indiana (IN), Maine (ME), Maryland (MD), Massachusetts (MA), Michigan (MI), Minnesota (MN), New Hampshire (NH), New Jersey (NJ), New York (NY), North Carolina (NC), Ohio (OH), Oregon (OR), Pennsylvania (PA), Rhode Island (RI), South Carolina (SC), Tennessee (TN), Vermont (VT), Virginia (VA), Washington (WA), West Virginia (WV), Wisconsin (WI)
California Counties and Islands: Name (Code)
Del Norte (DNT), Mariposa (MPA)?, Mendocino (MEN), Nevada (NEV)?, Plumas (PLU), Sonoma (SON), Tehama (TEH), Trinity (TRI), Tuolumne (TUO)
Quads: Name (Quad Code)
Childs Meadows (4012134), Cisco Grove (3912035), Covington Mill (4012287), Crescent Mills (4012018), El Capitan (3711966), Fort Bragg (3912347), Gasquet (4112378), Graniteville (3912046), Half Dome (3711965), Inglenook (3912357), Mathison Peak (3912336), Mt. Harkness (4012143), Pinecrest (3811928), Reading Peak (4012144), Sebastopol (3812247), Smoky Creek (4012332), Tamarack Flat (3711976), Yosemite Falls (3711975)
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant
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