Bouteloua kayi Warnock

This species is accepted, and its native range is SW. Texas.

[GB]
Morphology General Habit
Perennial; caespitose. Culms erect; 20-40(-50) cm long. Leaves mostly basal. Ligule a fringe of hairs. Leaf-blades involute; 1-1.5 mm wide; glaucous. Leaf-blade surface smooth, or scaberulous.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 7-15(-20); borne along a central axis; erect; unilateral; 1.5-3 cm long; bearing 7-14(-20) fertile spikelets on each. Rhachis semiterete; terminating in a barren extension; extension subulate. Spikelet packing broadside to rhachis; lax. Spikelets pectinate; solitary. Fertile spikelets pedicelled. Pedicels linear; 0.6-0.8 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 4-5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 4-5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 2.5-4 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex entire, or dentate; 2 -fid; acuminate; muticous, or mucronate. Upper glume lanceolate; 2.5-4 mm long; 1.2-1.3 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex entire, or dentate; 2 -fid; acuminate; muticous, or mucronate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 2-3 mm long; coriaceous; keeled; 3 -veined. Lemma surface glabrous, or pubescent; hairy at base. Lemma apex lobed; 3 -fid; with central lobe bidentate; awned; 3 -awned. Principal lemma awn 3-4 mm long overall. Lateral lemma awns arising on margin of lemma; 3-4 mm long; subequal to principal. Palea 2 -veined. Rhachilla extension glabrous. Apical sterile florets 1 in number; barren; cuneate; 0.5 mm long. Apical sterile lemmas lobed; 2 -fid; obtuse; awned; 3 -awned. Apical sterile lemma awns 3-4 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
North America: south-central USA.
Reference
Cynodonteae. Gould.

Native to:

Texas

Bouteloua kayi Warnock appears in other Kew resources:

First published in Field & Lab. 23: 15 (1955)

Accepted by

  • Powell, A.M. & Worthington, R.D. (2018). Flowering plants of Trans-Pecos Texas and ajacent areas: 1-1444. BRIT Press.

Not 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. [Cited as Chondrosum kayi.]

Literature

Kew Backbone Distributions

  • 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

  • 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