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This species is accepted, and its native range is Alaska to Mexico.

[GB]
Morphology General Habit
Perennial. Butt sheaths pilose. Culms 50-145 cm long. Culm-internodes distally glabrous. Culm-nodes glabrous. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs lacking, or ciliate. Ligule an eciliate membrane; 0.4-2 mm long; obtuse. Leaf-blades 10-35 cm long; 3-12 mm wide. Leaf-blade surface glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; nodding; 10-25 cm long. Primary panicle branches ascending, or spreading, or drooping. Panicle branches capillary. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 6-8 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 15-40 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 6-8 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 15-40 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet. Lower glume lanceolate; 7.5-12.5 mm long; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface glabrous. Upper glume lanceolate; 9-13.5 mm long; membranous; without keels; 3 -veined. Upper glume surface glabrous. Upper glume muticous, or mucronate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 9-16 mm long; chartaceous; without keel; 5 -veined. Lemma surface glabrous, or pubescent. Lemma margins ciliate; hairy below. Lemma apex awned; 1 -awned. Principal lemma awn subapical; 2-5 mm long overall. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3; 1-2 mm long. Ovary with a fleshy appendage above style insertion; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex.
Distribution
North America: Subarctic, northwest USA, southwest USA, south-central USA, and Mexico.
Reference
Bromeae. Pavlick 2004.

[GB]
Morphology General Habit
Perennial; caespitose. Culms geniculately ascending; 75-130 cm long; 4-6 -noded. Culm-internodes ridged; distally glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; pilose; with reflexed hairs; outer margin hairy. Ligule an eciliate membrane; 1.8 mm long; brown; ciliate from base of abaxial surface; erose. Leaf-blades 40-45 cm long; 7-8 mm wide. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins ciliate; hairy at base.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; nodding; 24-30 cm long. Primary panicle branches drooping; 8-16 cm long; bearing 2-5 fertile spikelets on each lower branch. Panicle axis scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 20-30 mm long; scabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 10-12 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 25-30 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.
Fertile
Spikelets comprising 10-12 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 25-30 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet. Lower glume lanceolate; 8.8-9.3 mm long; 0.75 length of upper glume; membranous; much thinner on margins; without keels; 1 -veined. Lower glume primary vein scabrous; eciliate, or ciliolate. Lower glume lateral veins absent. Lower glume apex setaceously attenuate. Upper glume lanceolate; 10.2-12.8 mm long; 0.9 length of adjacent fertile lemma; membranous; with hyaline margins; without keels; 3 -veined. Upper glume primary vein scabrous. Upper glume surface glabrous, or pubescent. Upper glume apex setaceously attenuate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 11.6-12.8 mm long; chartaceous; much thinner on margins; without keel; 7 -veined. Lemma surface pubescent. Lemma margins ciliate. Lemma apex acute; awned; 1 -awned. Principal lemma awn subapical; 3.5-4.5 mm long overall. Palea elliptic; 10.9-11 mm long. Palea surface glabrous, or puberulous; hairy on back. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 2.3-2.4 mm long; orange. Ovary with a fleshy appendage above style insertion; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex; apex fleshy. Hilum linear.
Distribution
North America: Mexico.
Reference
Bromeae. Sod, & Beaman 2001.

[GB]
Morphology General Habit
Perennial. Butt sheaths pubescent, or pilose. Culms 50-100 cm long. Culm-internodes distally glabrous. Culm-nodes pubescent. Leaf-sheaths glabrous on surface, or pubescent. Leaf-sheath oral hairs ciliate, or woolly. Ligule an eciliate membrane; 1 mm long, or 2 mm long; truncate, or obtuse. Leaf-blades 4-8 mm wide. Leaf-blade surface pilose; hairy adaxially, or on both sides.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; 10-20 cm long. Primary panicle branches ascending, or spreading. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 6-8 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 20-30 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 6-8 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 20-30 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet. Lower glume lanceolate; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface pubescent, or pilose. Lower glume apex mucronate. Upper glume lanceolate; membranous; without keels; 3 -veined. Upper glume surface pubescent, or pilose. Upper glume mucronate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 10-11 mm long; chartaceous; without keel; 5 -veined. Lemma surface pubescent, or pilose. Lemma apex awned; 1 -awned. Principal lemma awn subapical; 3-5 mm long overall. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3; 1.5-3 mm long. Ovary with a fleshy appendage above style insertion; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex.
Distribution
North America: southwest USA, south-central USA, and Mexico.
Reference
Bromeae. Pavlick 2004.

Native to:

Alaska, Alberta, Arizona, British Columbia, California, Colorado, Idaho, Mexico Central, Mexico Northeast, Mexico Northwest, Mexico Southwest, Montana, Nevada, New Mexico, South Dakota, Texas, Utah, Washington, Wyoming, Yukon

Introduced into:

Korea

Bromus richardsonii Link appears in other Kew resources:

First published in Hort. Berol. 2: 281 (1833)

Accepted by

  • Bennett, B.A., Catling, P.M., Cody, W.J. & Argus, G.W. (2010). New records of vascular plants in the Yukon territory VIII Canadian Field-Naturalist 124: 1-27.
  • Chang, C.S., Kim, H. & Chang, K.S. (2014). Provisional checklist of vascular plants for the Korea peninsula flora (KPF): 1-660. DESIGNPOST.
  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
  • Lee, W.T. (1996). Lineamenta Florae Koreae: 1-1688. Soul T'ukpyolsi: Ak'ademi Sojok.
  • 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.

Not accepted by

  • Allred, K.W. (2012). Flora Neomexicana, ed. 2, 1: 1-599. Range Science Herbarium, Las Cruces, New Mexico. [Cited as Bromus ciliatus.]

Literature

Kew Backbone Distributions

  • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
  • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
  • Lee, W.T. (1996). Lineamenta Florae Koreae: 1-1688. Soul T'ukpyolsi: Ak'ademi Sojok.
  • 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

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