Taxon Report

Rhynchospora alba (L.) Vahl

white beaked-rush

Print Report


© 2021 Scot Loring

  Classification
Scientific Name:
 Rhynchospora alba (L.) Vahl
Common Name:
 white beaked-rush
Family: Cyperaceae
Element Code: PMCYP0N010
USDA Plants Symbol: RHAL3
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial rhizomatous herb
Blooming Period: Jun-Aug Jun-Aug
Elevation: 60-2040 (195-6695)
General Habitats: Bogs and fens, Marshes and swamps, Meadows and seeps
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 2B.2
Global Rank: G5
State Rank:
 S2
State List: None
Fed List: None
Other Status: IUCN_LC
CRPR Changes:
  • changed from 2.2 to 2B.2 on 2013-06-12

Occurrence Data from the CNDDB
Total Occurrences: 17
Element Occurrence Ranks:
   Excellent (A) 5
   Good (B) 3
   Fair (C) 0
   Poor (D) 0
   None (X) 0
   Unknown (U) 9

Location
California Endemic:  False
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)

Threat List Data from the CNDDB

Threat List Total: 8
EOs with Threat Listed: Total EOs % of EOs
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%
ORV activity 1 5%
Other 1 5%
Vandalism/dumping/litter 1 5%

Notes
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.
Threats:
Taxonomy:

Selected References

USFS Potential Species of Conservation Concern Profile
Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 28 December 2024].