Bouteloua scorpioides Lag.

This species is accepted, and its native range is Mexico.

[GB]
Morphology General Habit
Perennial; caespitose. Culms geniculately ascending; slender; 20-35 cm long. Culm-nodes glabrous, or bearded. Leaves mostly basal. Leaf-sheaths glabrous on surface. Ligule a fringe of hairs. Leaf-blades involute; 2.5-7(-9) cm long; 1-2 mm wide. Leaf-blade surface scaberulous; rough adaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Peduncle tipped by a glumaceous appendage (2 bracts). Racemes 1; single; arcuate; unilateral; 3.5-5 cm long; bearing 50-90 fertile spikelets on each. Rhachis semiterete; glabrous on surface; terminating in a spikelet. Spikelet packing broadside to rhachis; crowded. Spikelets pectinate; 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 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; 5-6 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; 3-3.5 mm long; 0.6 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse, or acute. Upper glume lanceolate; 5-5.5 mm long; 1.1-1.2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse, or acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 4-5 mm long; coriaceous; keeled; 3 -veined. Lemma midvein ciliate; hairy below. Lemma surface pilose. Lemma margins ciliate; hairy below. Lemma apex lobed; 3 -fid; with central lobe bidentate; awned; 3 -awned. Principal lemma awn from a sinus; 1.5 mm long overall. Lateral lemma awns arising on inner edge of lobes; 2 mm long; longer than principal. Palea 2 -veined. Rhachilla extension pubescent; hairy at tip. Apical sterile florets 2 in number; barren; in a clump; oblong; 2 mm long. Apical sterile lemmas lobed; 2 -fid; obtuse; awned; 3 -awned. Apical sterile lemma awns 4-4.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; obovoid; 1.8-2.2 mm long.
Distribution
North America: Mexico.
Reference
Cynodonteae. Gould.

Native to:

Mexico Central, Mexico Northeast, Mexico Southwest

Bouteloua scorpioides Lag. appears in other Kew resources:

First published in Gen. Sp. Pl.: 5 (1816)

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 scorpioides.]

Literature

Kew Backbone Distributions

  • 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.

  • 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