Bromus sitchensis var. carinatus

From Puget Prairie Plants
  • Scientific Name: Bromus sitchensis var. carinatus
  • Family: Poaceae
  • Common Names: California brome
  • Synonyms/Misapplications: Bromus carinatus, Ceratochloa carinata
  • Codon: BROSIT

Photo by Craig Althen, 2015. Also featured on Main Page


Scientific classification
Kingdom: Plantae
Subkingdom: Viridiplantae
Phylum: Tracheophyta
Subphylum: Spermatophytina
Class: Magnoliopsida
Order: Poales
Family: Poaceae
Genus: Bromus L.
Species: Bromus carinatus Hook. & Arn.
Subspecies: "Bromus carinatus var. carinatus Hook. & Arn.
  • Ceratochloa carinata (Hook. & Arn.) Tutin



Perennial grass with erect culms to 180 cm tall.[2] Sheaths closed, often pubescent, auricles greatly reduced or absent.[3] Inflorescences narrow panicles with 6 to 9-flowered, laterally-compressed spikelets.[2] Panicle branches with 1-5 spikelets.[4] Lemmas keeled, awned,[4] 7-11 veined, laterally compressed, typically glabrous;[2] lower glumes 3-7 veined, glabrous.[4]

Bloom Period



Across western North America.[3]


Prairies, grasslands, shrublands, open forest.[4]


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Bromus carinatus, photo by Lisa Hintz
Bromus carinatus, photo by Lisa Hintz

Seed sample from: 2008

Average measurement: 14.6 x 1.5 x 1.5

Measurement range: L: 13.5 – 16 W: 1.1 – 1.8 D: 1.2 - 2


Shape: Inner seed is about ½ the size of its husk, and brown.

Color:Seed husk tan, tending to be whiter toward hilium, and browner towards awn.

Surface:Hilium is somewhat glossy, while rest of husk is very hairy. Awn is brown and straight. Surface of seed longitudinally striate and glossy.

Latitudinal cross section: elliptical BRCA lat.png

Longitudinal cross section: elliptical BRCA long.png

Basic Explanations and Assumptions:

The dimensions for the seeds are length x width x depth. The location of the hilum is used as the base of the seed, and the length is measured from hilum to the opposite apex. Where a style is present, the length is measured from the hilum to the bottom of the style. Width is measured at a right angle to the length at the widest part. Depth is measured at a right angle to the intersection of height and width lines.

Measurements included are the mean average for each measurement of ten separate seeds.

All measurements in millimeters unless otherwise noted.

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  1. Integrated Taxonomic Information System. Retrieved from
  2. 2.0 2.1 2.2 Flora of North America. Retrieved from
  3. 3.0 3.1 3.2 WTU Herbarium, Burke Museum, & University of Washington. Retrieved from
  4. 4.0 4.1 4.2 4.3 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. p. 781.