Family:
Poaceae Barnhart
Genus:
Bouteloua Lag.

Bouteloua eriostachya (Swallen) Reeder

This species is accepted, and its native range is Mexico (W. Coahuila).

[GB]
Morphology General Habit
Perennial; persisting, or short-lived; caespitose. Rootstock evident. Stolons absent. Culms erect; 40-60 cm long. Culm-internodes distally woolly. Leaves mostly basal. Ligule a ciliate membrane. Leaf-blades convolute; 0.5-2 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 3-8; borne along a central axis; unilateral; 2-5 cm long; bearing 8-12 fertile spikelets on each. Central inflorescence axis 10-15 cm long. Rhachis semiterete; villous on surface. Spikelet packing broadside to rhachis; contiguous. Raceme-bases brief; pubescent. 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; 6-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
Fertile
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 6-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 5-7 mm long; 0.7-0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute, or acuminate. Upper glume lanceolate; 6-9 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface smooth, or scabrous; villous, or woolly. Upper glume apex acute, or acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 6-9 mm long; coriaceous; keeled; 3 -veined. Lemma surface glabrous, or pubescent; hairy at base. Lemma apex lobed; 3 -fid; awned; 1 -awned. Principal lemma awn 1.5-3 mm long overall. Palea 2 -veined. Rhachilla extension pubescent; hairy at tip. Apical sterile florets 1 in number; barren; rudimentary. Apical sterile lemmas awned; 3 -awned. Apical sterile lemma awns 4-8 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; obovoid; 2.5-3 mm long.
Distribution
North America: Mexico.
Reference
Cynodonteae. Gould.

Native to:

Mexico Northeast

Bouteloua eriostachya (Swallen) Reeder appears in other Kew resources:

First published in Bull. Torrey Bot. Club 94: 7 (1967)

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 eriostachyum.]

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