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This species is accepted, and its native range is SW. & S. Central U.S.A. to NW. Mexico.

[GB]
Morphology General Habit
Annual. Culms 30-70 cm long. Leaf-sheaths glabrous on surface, or pilose. Ligule an eciliate membrane. Leaf-blades 2-5 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate; 10-25 cm long. Primary panicle branches appressed, or ascending. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5-8 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; compressed strongly; 25-30 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 5-8 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; compressed strongly; 25-30 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 0.8-0.9 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume surface glabrous, or puberulous. Lower glume apex acuminate. Upper glume lanceolate; 1 length of adjacent fertile lemma; membranous; 1-keeled; 5 -veined. Upper glume surface glabrous, or puberulous. Upper glume margins ciliolate. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 11-15 mm long; herbaceous; keeled; 7 -veined. Lemma surface glabrous, or pilose. Lemma apex dentate; 2 -fid; with lobes 0.7-2 mm long; acute; awned; 1 -awned. Principal lemma awn subapical; 7-15 mm long overall. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3. 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: southwest USA and south-central .
Reference
Bromeae. Gr Texas 1997.

Native to:

Arizona, California, Mexico Northwest, Nevada, New Mexico, Texas

Bromus arizonicus (Shear) Stebbins appears in other Kew resources:

First published in Proc. Calif. Acad. Sci., ser. 4, 25: 309 (1944)

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.
  • 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.
  • 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 catharticus.]

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

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