Family:
Poaceae Barnhart
Genus:
Bromus L.

Bromus anomalus Rupr. ex E.Fourn.

This species is accepted, and its native range is S. Central U.S.A. to Central America.

[GB]
Morphology General Habit
Perennial; caespitose. Culms 45-75 cm long. Culm-nodes pubescent. Leaf-sheaths pilose. Ligule an eciliate membrane; 0.5-1 mm long. Leaf-blades 2-5 mm wide. Leaf-blade surface scabrous; rough adaxially; pilose; sparsely hairy; hairy on both sides.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate; 10-15 cm long; bearing few spikelets. Primary panicle branches drooping. Panicle branches flexuous; pubescent. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 7-9 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 22-27 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 7-9 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 22-27 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; 0.75 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface glabrous, or pubescent. Lower glume apex acuminate. Upper glume lanceolate; 0.75 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume surface glabrous, or pubescent. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 11 mm long; chartaceous; without keel; 5-7 -veined. Lemma surface pubescent; hairy all along. Lemma apex obtuse; awned; 1 -awned. Principal lemma awn subapical; 1-4 mm long overall. Palea 9.5 mm long. Palea surface puberulous; hairy on back. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 2.5 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: western Canada, northwest USA, north-central USA, southwest USA, south-central USA, and Mexico. South America: Mesoamericana.
Reference
Bromeae. Gr Texas 1993.

[GB]
Morphology General Habit
Perennial; culms solitary. Butt sheaths persistent and investing base of culm. Culms erect; 40-85 cm long. Culm-internodes distally glabrous. Culm-nodes glabrous, or pubescent. Leaf-sheaths mostly shorter than adjacent culm internode; hirsute; with reflexed hairs. Ligule an eciliate membrane; 0.5-0.7 mm long; brown; glabrous on abaxial surface; erose. Leaf-blades 15-30 cm long; 3-4 mm wide. Leaf-blade surface scaberulous; rough on both sides; glabrous, or pubescent; sparsely hairy; hairy on both sides. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; 8-17 cm long. Primary panicle branches bearing 2-6 fertile spikelets on each lower branch. Panicle branches flexuous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 7-15 mm long; scabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets elliptic, or cuneate; laterally compressed; 15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.
Fertile
Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets elliptic, or cuneate; laterally compressed; 15 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; 4.4-6.6 mm long; 0.6-0.8 length of upper glume; membranous; much thinner on margins; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume elliptic; 7.2-8 mm long; 0.75 length of adjacent fertile lemma; membranous; with hyaline margins; without keels; 3 -veined. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 9.7-9.8 mm long; chartaceous; without keel; 7 -veined. Lemma lateral veins with distinct primaries but obscure intermediates. Lemma surface scabrous. Lemma apex awned; 1 -awned. Principal lemma awn subapical; 1 mm long overall. Palea elliptic; 6.6-7.2 mm long. Palea surface glabrous. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 2.1 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.

Native to:

Costa Rica, Guatemala, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, New Mexico, Panamá, Texas

Bromus anomalus Rupr. ex E.Fourn. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Hinton, G.B. [4984], México State K000465743 No
Hinton, G.B. [4186], México State K000465741 No
Hinton, G.B. [4186], México State K000465742 No

First published in Mexic. Pl. 2: 126 (1886)

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.
  • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.
  • 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.
  • Powell, A.M. & Worthington, R.D. (2018). Flowering plants of Trans-Pecos Texas and ajacent areas: 1-1444. BRIT Press.
  • 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

  • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.
  • 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.

  • GrassBase - The Online World Grass Flora

    http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. 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 2022. 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