Plagiobothrys hystriculus
Common Name: bearded popcornflower
Family: Boraginaceae
Element Code: PDBOR0V0H0
Full Name: Plagiobothrys hystriculus (Piper) Jtn.

2007 Carol W. Witham
Biology Glossary
Rarity Status Glossary
Occurrence Data from DFG
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 14
  • Element Occurrence Ranks:
    A B C D X U
    3 3 1 0 0 7
  • Population Status:
    >20 yrs
    <=20 yrs
    3 11
  • Presence:
    Present Extant Possibly Extirpated Extirpated
    14 0 0
Notes Glossary
  • 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: 2015-11-04
Location Glossary
  • 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
Suggested Citation
CNPS, Rare Plant Program. . Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. Website [accessed ].

38121B7=Birds Landing (481A) 38121B7;38121B8=Denverton (481B) 38121B8;38121A7=Antioch North (481D) 38121A7;38121D6=Saxon (497B) 38121D6;38121D8=Allendale (498B) 38121D8;38121C8=Elmira (498C) 38121C8;38121C7=Dozier (498D) 38121C7;38122G3=Knoxville (532D) 38122G3