Taxon Report

Bulbostylis capillaris (L.) Clarke

thread-leaved beakseed

Print Report


©2016 Ryan Batten

Taxon Summary

Bulbostylis capillaris, commonly known as thread-leaved beakseed, is a annual herb in the Cyperaceae that is found in California and elsewhere. It occurs within Lower montane coniferous forest, Meadows and seeps, and Upper montane coniferous forest, growing at elevations from 395 to 2075 meters. Bulbostylis capillaris is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.

  Classification
Scientific Name:
 Bulbostylis capillaris (L.) Clarke
Common Name:
 thread-leaved beakseed
Family: Cyperaceae
Element Code: PMCYP02020
USDA Plants Symbol: BUCA2
Synonyms/Other Names:

Ecology and Life History
Lifeform: annual herb
Blooming Period: Jun-Aug Jun-Aug
Elevation: 395-2075 (1295-6810)
General Habitats: Lower montane coniferous forest, Meadows and seeps, Upper montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 4.2
Global Rank: G5
State Rank:
 S3
State List: None
Fed List: None
Other Status: IUCN_LC
CRPR Changes:

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

Location
California Endemic:  False
California Counties and Islands: Name (Code)
Alpine (ALP), Butte (BUT), El Dorado (ELD), Fresno (FRE), Mariposa (MPA), Nevada (NEV), Plumas (PLU), Shasta (SHA), Sierra (SIE), Tehama (TEH), Tuolumne (TUO)
Quads: Name (Quad Code)
American House (3912161), Berry Creek (3912164), Brush Creek (3912163), Cherokee (3912165), Cisco Grove (3912035), Dardanelle (3811937), El Capitan (3711966), Falls Ridge (3711984), Half Dome (3711965), Haskins Valley (3912172), Hetch Hetchy Reservoir (3711986), Homewood (3912012), Kibbie Lake (3811917), Kimshew Point (3912184), Lake Eleanor (3711987), Luckett Mtn. (3611972), Manton (4012147), Oroville (3912155), Oroville Dam (3912154), Project City (4012263), Sacate Ridge (3611982), Sierra City (3912056), Stover Mtn. (4012133), Tamarack (3812041), Ten Lakes (3711985), Tiltill Mtn. (3811916)

Threat List Data from the CNDDB

Threat List Total: 0
EOs with Threat Listed: Total EOs % of EOs
0 0 %

Notes
Endangered in OR. See Sida 4:98-99 (1971) for taxonomic treatment.
Threats:
Taxonomy:

Selected References

Bulbostylis capillaris account for potential Species of Conservation Concern evaluation (2021)
Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 5 February 2025].