Bouteloua warnockii Gould & Kapadia

First published in S. W. Naturalist 7: 176 (1962)
This species is accepted
The native range of this species is S. Central U.S.A. to N. Mexico. It is a perennial and grows primarily in the desert or dry shrubland biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Culms erect; 20-35(-50) cm long. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 1-1.5 mm long. Leaf-blades straight, or curved; involute; 5-15(-25) cm long; 1-1.5(-2.5) mm wide; glaucous. Leaf-blade margins tuberculate-ciliate; hairy at base. Leaf-blade apex attenuate; filiform.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 9-15(-25); borne along a central axis; unilateral; 0.4-0.6 cm long; bearing 2-6 fertile spikelets on each. Central inflorescence axis 5-10 cm long; tip filiform. Rhachis deciduous from axis; angular; terminating in a barren extension; extension subulate. Spikelet packing broadside to rhachis; lax. Spikelets appressed; solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 5-6.5 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; 5-6.5 mm long; falling entire; deciduous with accessory branch structures.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes similar; shorter than spikelet; thinner than fertile lemma; gaping. Lower glume lanceolate; 3-5 mm long; 0.7-0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 4-6 mm long; 0.7-0.8 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma ovate; 5-6.5 mm long; coriaceous; keeled; 3 -veined. Lemma apex dentate; 3 -fid; awned; 3 -awned. Principal lemma awn 0.5-1 mm long overall. Lateral lemma awns arising on margin of lemma; 0.5-1 mm long; subequal to principal. Palea apex with excurrent keel veins. Rhachilla extension glabrous. Apical sterile florets 1 in number; barren; rudimentary. Apical sterile lemmas awned; 3 -awned. Apical sterile lemma awns unequal; 4-5 mm long.
Morphology Reproductive morphology Flowers
Anthers purple.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ovoid; 3.2-3.6 mm long.
Distribution
North America: south-central USA.
Reference
Cynodonteae. Gould.
[GB]

Sources

  • 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 Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0