CNPS Inventory Plant Detail

Plagiobothrys hystriculus

Common Name:	bearded popcorn-flower
Family:	Boraginaceae
Synonyms:
Element Code:	PDBOR0V0H0
Full Name:	Plagiobothrys hystriculus (Piper) Jtn.
USDA PLANTS Symbol:	PLHY

Biology
Lifeform: annual herb Blooming Period: April - May Habitat: often vernal swales. • Valley and foothill grassland (mesic) • Vernal pools margins

Rarity Status
CA Rare Plant Rank: 1B.1 Rare, threatened, or endangered in California and elsewhere .1: Seriously endangered in California Federal Listing Status: Not Listed State Listing Status: Not Listed State Rank: S1S2 S1: Critically Imperiled. S2: Imperiled. Global Rank: G1G2 G1: Critically Imperiled. G2: Imperiled.

Occurrence Data from DFG
California Natural Diversity Database

Total # of Known Element Occurrences: 14
Element Occurrence Ranks:

A B C D X U

3 3 1 0 0 7

Population Status:

Historic >20 yrs	Recent <=20 yrs
3	11

Presence:

Present Extant	Possibly Extirpated	Extirpated
14	0	0

Notes

Rediscovered in 2005 by B. Schafer, M. Widdowson, and R. Preston; last seen in 1892. Known only from the Montezuma Hills; all other reports have been misidentifications. Easily confused with P. acanthocarpus, P. trachycarpus, and others. Habitat between the Motezuma Hills and Elmira should be surveyed for additional occurrences. Threatened by disking, development, and non-native plants. See Contributions of the U.S. National Herbarium 22:79-113 (1920) for original description, Contributions from the Arnold Arboretum 3:5-82 (1932) for revised nomenclature, and Madroño 57(4):242-245 (2010) for discussion of rediscovery.
To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
Date Added: 1974-01-01
Last Update: 2011-05-17

Location

Elevation: 0 - 274 meters

California Endemic: yes

States: California

California Counties and Islands: name (code)
Napa (NAP), Solano (SOL), Yolo (YOL)

Quads: name (DWR code) USGS code
Birds Landing (481A) 38121B7, Denverton (481B) 38121B8, Antioch North (481D) 38121A7, Saxon (497B) 38121D6, Allendale (498B) 38121D8, Elmira (498C) 38121C8, Dozier (498D) 38121C7, Knoxville (532D) 38122G3

Notes:

Definitions of codes preceding a county and/or quad:
*		Presumed extirpated
?		Uncertain about distribution or identity
?*		Uncertain about distribution, but presumed extirpated if once present
(?)		Occurrence confirmed, but possibly extirpated

Species may be present in other areas where conditions are favorable.

Presumed Extant

Presumed Extirpated or Unknown

1386

Links to Leading Resources of Taxon Information
USDA PLANTS Calflora CalPhotos Consortium of California Herbaria California Department of Fish and Game: CNDDB Quick Viewer

Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .

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