Plagiobothrys scouleri

From Puget Prairie Plants
  • Scientific Name: Plagiobothrys scouleri
  • Family: Boraginaceae
  • Common Names: Scouler's popcorn flower
  • Synonyms/Misapplications: Allocarya granulata, Allocarya scouleri, Plagiobothrys granulatus

Photo by Ben Legler, 2004, also featured on Main Page


Scientific classification
Kingdom: Plantae
Subkingdom: Viridiplantae
Phylum: Tracheophyta
Subphylum: Spermatophytina
Class: Magnoliopsida
Subclass: Asteranae
Order: Boraginales
Family: Boraginaceae
Genus: Plagiobothrys Fisch. & C.A. Mey.
Species: Plagiobothrys scouleri (Hook & Arn.) I.M. Johnst.
  • Plagiobothrys granulatus (Piper) I.M. Johnst.
  • Allocarya californica (Fisch. & C.A. Mey.) Greene
  • Allocarya granulata Piper
  • Allocarya scouleri (Hook. & Arn.) Greene
  • Plagiobothrys scouleri var. scouleri (Hook. & Arn.) I.M. Johnst.
  • Plagiobothrys reticulatus var. rossianorum I.M. Johnst.



Hairy, tap-rooted annual.

Flowers grow in tight, elongate clusters and have 5 petals fused at the base with a small set of appendages in the corolla throat where the white petals become yellow. Calyx is also basally fused and very hairy.

Leaves are narrow, hairy, lower pairs of leaves are opposite, becoming alternate up the stem. [2][3]

Fruits are nutlets and have a ventral keel with a raised scar along the keel.[4]

Bloom Period



South Victoria Island to Northwestern California, West Cascades, east in Columbia River Gorge to Blue Mountains.[4]


Vernally moist depressions, shorelines.[4]

Photo Gallery


  1. Integrated Taxonomic Information System. Retrieved from
  2. Bowcutt, F., & Hamman, Sarah. (2016). Vascular plants of the South Sound prairies (First ed.). Olympia, Washington: The Evergreen State College Press.
  3. 3.0 3.1 WTU Herbarium, Burke Museum, & University of Washington. Retrieved from
  4. 4.0 4.1 4.2 Hitchcock, C. L., Cronquist, A., Giblin, D., & Legler, B. et al. (2018). Flora of the Pacific Northwest: an illustrated manual. Seattle: University of Washington Press.