Family:
Poaceae Barnhart
Genus:
Bouteloua Lag.

Bouteloua polymorpha (E.Fourn.) Columbus

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

[GB]
Morphology General Habit
Perennial; caespitose. Culms erect; 15-30 cm long. Ligule a fringe of hairs. Leaf-blades 5-10 cm long; 1 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 4-8; borne along a central axis; cuneate; 0.6-1 cm long; bearing few fertile spikelets; bearing 2 fertile spikelets on each. Central inflorescence axis 2 cm long; tip filiform (0.5-1mm, forked). Rhachis deciduous from axis; terminating in a barren extension; extension a forked bristle. Spikelets in pairs. Fertile spikelets sessile; 2 in the cluster.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; dorsally compressed; 5-6 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus bearded.
Fertile
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; dorsally compressed; 5-6 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus bearded.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar. Lower glume subulate; 4 mm long. Lower glume surface hispid. Upper glume subulate; 5-6 mm long. Upper glume surface hispid.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 3-4 mm long; cartilaginous; without keel; 3 -veined. Lemma lateral veins close to midvein. Lemma surface pilose. Lemma hairs 1 mm long. Lemma apex lobed; 3 -fid; with outer lobes shorter and with central lobe bidentate; incised 0.33 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; 3-4 mm long overall. Lateral lemma awns arising on margin of lemma; 3-4 mm long; subequal to principal. Palea 1 length of lemma. Palea apex dentate; 2 -fid; with excurrent keel veins. Apical sterile florets 1 in number; male; lanceolate; 2.5-3 mm long. Apical sterile lemmas awned; 3 -awned. Apical sterile lemma awns 3-4 mm long.
Morphology Reproductive morphology Flowers
Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
North America: Mexico.
Reference
Cynodonteae. Griffiths.

Native to:

Mexico Central, Mexico Northeast, Mexico Northwest, Mexico Southwest

Bouteloua polymorpha (E.Fourn.) Columbus appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Hinton, G.B. [9050], Guerrero K000465991 No
Hinton, G.B. [4231], México State K000465992 No
Hinton, G.B. [4297], México State K000465994 No
Hinton, G.B. [4231], México State K000465995 No
Hinton, G.B. [4272], México State K000465993 No
Pringle, C.G. [2559], Mexico Pentarrhaphis polymorpha K000309064 Yes

First published in Aliso 18: 63 (1999)

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 Pentarrhaphis polymorpha.]

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

  • 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 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