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This species is accepted, and its native range is California to Mexico (N. Baja California).
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial. Culms erect, or geniculately ascending; 60-120 cm long; 4-6 -noded. Culm-internodes distally pubescent. Culm-nodes pubescent. Leaf-sheaths glabrous on surface, or pilose. Ligule an eciliate membrane; 0.5-1 mm long; erose. Leaf-blades 8-25 cm long; 3-7.5 mm wide. Leaf-blade surface glabrous, or pilose. Leaf-blade margins glabrous, or ciliate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic, or ovate; equilateral, or nodding; 9-15 cm long. Primary panicle branches ascending, or spreading; 2 -nate. Panicle axis puberulous. Panicle branches glabrous, or puberulous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-10 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 15-35 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 4-10 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 15-35 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 4-6 mm long; 0.66-0.75 length of upper glume; membranous; without keels; 3 -veined. Lower glume surface pubescent. Lower glume apex obtuse, or acute. Upper glume lanceolate; 6.5-8 mm long; 0.66 length of adjacent fertile lemma; membranous; without keels; 5 -veined. Upper glume surface pubescent. Upper glume apex obtuse, or acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 10-12 mm long; herbaceous; without keel; 7 -veined. Lemma surface glabrous, or pubescent. Lemma margins pubescent. Lemma apex obtuse, or acute; awned; 1 -awned. Principal lemma awn subapical; 3-5 mm long overall. Palea keels ciliate. Palea surface puberulous; hairy on back. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 3.5-5 mm long. Ovary with a fleshy appendage above style insertion; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid; 6-9 mm long; yellow; hairy at apex; apex fleshy. Hilum linear.
Distribution
North America: southwest USA and Mexico.
Reference
Bromeae. Wagnon 1997.

Native to:

California, Mexico Northwest

Bromus pseudolaevipes Wagnon appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Wagnon, H.K. [1520], USA K000913840 Unknown type material
Wagnon, H.K. [1507], USA K000913839 Unknown type material

First published in Leafl. W. Bot. 6: 64 (1950)

Accepted by

  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Saarela, J.M., Peterson, P.M. & Váldes-Reyna, J. (2014). A taxonomic revision of Bromus (Poaceae: Pooideae: Bromeae) in México and Central America Phytotaxa 185(1): 1-147.

Literature

Kew Backbone Distributions

  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Saarela, J.M., Peterson, P.M. & Váldes-Reyna, J. (2014). A taxonomic revision of Bromus (Poaceae: Pooideae: Bromeae) in México and Central America Phytotaxa 185(1): 1-147.

GrassBase - The Online World Grass Flora
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0