Bouteloua rigidiseta (Steud.) Hitchc.

This species is accepted, and its native range is Oklahoma to Louisiana and N. Mexico.

[GB]
Morphology General Habit
Perennial; caespitose. Culms 10-50 cm long. Ligule a fringe of hairs. Leaf-blades flat, or involute; 4-12(-17) cm long; 1-2 mm wide. Leaf-blade surface pilose; sparsely hairy.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 7-10; borne along a central axis; spreading; cuneate; unilateral; 0.8-1.6 cm long; bearing few fertile spikelets; bearing 3-5 fertile spikelets on each. Central inflorescence axis 3-6 cm long. Rhachis deciduous from axis; angular; pilose on surface; terminating in a barren extension; extension a forked bristle. Spikelet packing broadside to rhachis. Spikelets ascending; solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 2.5-4 mm long; falling entire; deciduous with accessory branch structures.
Fertile
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 2.5-4 mm long; falling entire; deciduous with accessory branch structures.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes similar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume linear; 2-3.5 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 2.5-4 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein conspicuous; ciliate. Upper glume lateral veins absent. Upper glume apex dentate; 2 -fid; awned; 1 -awned. Upper glume awn 1-2.5 mm long.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 2.5-4 mm long; coriaceous; keeled; 3 -veined. Lemma surface glabrous, or puberulous. Lemma apex dentate; 3 -fid; with central lobe bidentate; awned; 3 -awned. Principal lemma awn from a sinus; 1.5-2 mm long overall. Lateral lemma awns arising on apex of lobes; 1 mm long; shorter than principal. Rhachilla extension glabrous. Apical sterile florets 1 in number; barren; rudimentary. Apical sterile lemmas awned; 3 -awned. Apical sterile lemma awns 5-10 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; obovoid. Embryo 0.66 length of caryopsis.
Distribution
North America: north-central USA, south-central USA, and Mexico.
Reference
Cynodonteae. Gould.

[GB]
Morphology General Habit
Perennial. Culms slender; 40-50 cm long. Leaf-sheaths scaberulous; glabrous on surface. Ligule a fringe of hairs; 0.5 mm long. Leaf-blades involute; 6-17 cm long; 1-2 mm wide. Leaf-blade surface smooth, or scaberulous; glabrous, or pubescent; sparsely hairy; hairy adaxially. Leaf-blade margins scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 2-8; borne along a central axis; ascending; cuneate; unilateral; 0.8-1.6 cm long; bearing few fertile spikelets; bearing 2-5 fertile spikelets on each. Central inflorescence axis 3-6 cm long. Rhachis deciduous from axis; angular; pilose on surface; terminating in a barren extension; extension subulate. Spikelet packing broadside to rhachis. Spikelets ascending; solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 5-7 mm long; falling entire; deciduous with accessory branch structures.
Fertile
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 5-7 mm long; falling entire; deciduous with accessory branch structures.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 3-4 mm long; 0.5 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface glabrous, or pubescent; hairy at base. Lower glume apex acuminate. Upper glume lanceolate; 6-8 mm long; 1.3 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 4-6 mm long; coriaceous; keeled; 3 -veined. Lemma surface puberulous; hairy on veins. Lemma apex dentate; 3 -fid; with central lobe bidentate; awned; 3 -awned. Principal lemma awn from a sinus; 2 mm long overall. Lateral lemma awns arising on inner edge of lobes; 1 mm long; shorter than principal. Apical sterile florets 1-2 in number; barren; in a clump; cuneate; 4-5 mm long. Apical sterile lemmas lobed; 4 -fid; awned; 3 -awned. Apical sterile lemma awns 7-9 mm long.
Morphology Reproductive morphology Flowers
Anthers 3; 2.5-3 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
North America: Mexico.
Reference
Cynodonteae. Arrieta et al 2006.

Native to:

Arkansas, Louisiana, Mexico Northeast, Mexico Northwest, New Mexico, Oklahoma, Texas

Introduced into:

Massachusetts

Bouteloua rigidiseta (Steud.) Hitchc. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Jan 1, 1964 Berlandier, J.L. [1535], Texas K000885828 isotype Yes
Drummond, T. [374], Texas K000885826 syntype Yes
Drummond, T. [340], Texas K000885824 isotype Yes
Berlandier, J.L. [1535], USA K000885822 lectotype Yes
Wright, C. [752], USA K000885825 syntype Yes
Drummond, T. [340], Texas K000885827 isotype Yes
Drummond, T. [374], Texas K000885823 syntype Yes

First published in J. Washington Acad. Sci. 23: 453 (1933)

Accepted by

  • Allred, K.W. (2012). Flora Neomexicana, ed. 2, 1: 1-599. Range Science Herbarium, Las Cruces, New Mexico.
  • 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 (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

Literature

Kew Backbone Distributions

  • Allred, K.W. (2012). Flora Neomexicana, ed. 2, 1: 1-599. Range Science Herbarium, Las Cruces, New Mexico.
  • 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 (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

  • 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 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