Bouteloua triaena (Trin.) Scribn.

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

[GB]
Morphology General Habit
Perennial; caespitose. Culms erect, or geniculately ascending; 20-50 cm long. Ligule a ciliolate membrane. Leaf-blades 2-6 cm long; 1-3 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes numerous; 20-80; borne along a central axis; deflexed, or spreading; unilateral; 0.5-0.6 cm long; bearing 1 spikelet; bearing 1 fertile spikelets on each. Central inflorescence axis 8-15 cm long; tip subulate. Rhachis deciduous from axis; subterete; terminating in a barren extension; extension bristle-like. Spikelet packing broadside to rhachis. 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 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 mm long; falling entire; deciduous with accessory branch structures.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes similar; shorter than spikelet; similar to fertile lemma in texture; gaping. Lower glume lanceolate; 2-3 mm long; 0.5 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 4-6 mm long; 0.66-0.75 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 6-8 mm long; membranous; yellow, or purple; keeled; 3 -veined. Lemma surface puberulous. Lemma apex entire; acute; muticous. Rhachilla extension glabrous. Apical sterile florets 1 in number; barren; rudimentary. Apical sterile lemmas awned; 3 -awned. Apical sterile lemma awns 10-15 mm long.
Morphology Reproductive morphology Flowers
Anthers 3; yellow, or orange.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ovoid; 3 mm long.
Distribution
North America: Mexico. South America: Mesoamericana.
Reference
Cynodonteae. Gould.

Native to:

Guatemala, Mexico Central, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest

Bouteloua triaena (Trin.) Scribn. appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Jan 1, 1964 Hinton, G.B. [5463], Guerrero K000476015 No
Hinton, G.B. [6882], Guerrero K000476013 No
Hinton, G.B. [5981], Guerrero K000476012 No
Hinton, G.B. [2512], México State K000476014 No

First published in Proc. Acad. Nat. Sci. Philadelphia 43: 307 (1891)

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.
  • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.
  • 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.

Literature

Kew Backbone Distributions

  • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.
  • 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

  • Herbarium Catalogue Specimens

  • 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