CNPS.ORG Inventory of Rare and Endangered Plants - 7th edition interface
v7-18mar 3-19-18
Status: record plagiobothrys_hystriculus - Thu, Dec. 2, 2021, 16:08 ET b
Plagiobothrys hystriculus
common namebearded popcornflower
CalPhotos image
more photos
© 2006 Robert E. Preston, Ph.D.  Follow image link for photo data.
life formannual herb
CA Rare Plant Rank
List 1B.1
LIST 1B: Rare, threatened, or endangered in California and elsewhere.
     0.1: Seriously endangered in California
state rank
S2      ranking system key
global rank
G2     G2: 6-20 occurrences OR 1,000-3,000 individuals OR 2,000-10,000 acres
Where did the "RED" code go?
CA state listingNone  
federal listingNone  
where found
MAPS - Use v8 link below.

Topographic quads (8):
Birds Landing (481A) 3812127, Denverton (481B) 3812128, Antioch North (481D) 3812117, Saxon (497B) 3812146, Allendale (498B) 3812148, Elmira (498C) 3812138, Dozier (498D) 3812137, Knoxville (532D) 3812273
quad data info

Counties, states, regions:
Napa (NAP), Solano (SOL), Yolo (YOL)
A reminder: Species not recorded for a given area may nonetheless be present, especially where favorable conditions occur.
CNPS habitats•Valley and foothill grassland (VFGrs)(mesic)
•Vernal pools (VnPls)margins/often vernal swales
blooming period Apr-May  
elevation range0 - 274 meters
Rediscovered in 2005 by B. Schafer, M. Widdowson, and R. Preston; last seen in 1892. Easily confused with P. acanthocarpus, P. trachycarpus, and others. 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 Madroņo 57(4):242-245 (2010) for discussion of rediscovery.
full namePlagiobothrys hystriculus (Piper) Jtn.
Version 8    INVENTORY VERSION 8 interface for this taxon, including GIS and more links

Additional information:
standard acronym  PLHY Element Code  PDBOR0V0H0
CalFlora species this taxon    CalFlora genus related taxa
Jepson Online Jepson Interchange  Jepson Manual and other resources
Google search
search Google CNPS website    search Google entire web

Suggested citation: California Native Plant Society (CNPS). 2018. Inventory of Rare and Endangered Plants (online edition, v7-18mar). California Native Plant Society. Sacramento, CA. Accessed on Thu, Dec. 2, 2021 from

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