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  1. Family: Poaceae Barnhart
    1. Genus: Hilaria Kunth
      1. Hilaria swallenii Cory

        This species is accepted, and its native range is S. Central U.S.A. to NE. Mexico.

    [GB]
    Habit
    Perennial; caespitose. Stolons present. Culms erect; 10-30 cm long. Culm-internodes distally glabrous. Culm-nodes bearded. Leaves mostly basal. Leaf-sheaths scaberulous. Ligule an eciliate membrane; 2-2.2 mm long. Leaf-blades flat, or involute; 4-8 cm long; 1-2 mm wide. Leaf-blade surface ribbed; scabrous; rough on both sides.
    Inflorescences
    Inflorescence composed of racemes. Racemes 2-8; borne along a central axis; closely spaced; in a multilateral false spike; oblong; unilateral; 0.6-0.8 cm long; bearing a triad of spikelets. Central inflorescence axis 1-4 cm long. Rhachis obsolete; deciduous from axis. Spikelets in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets sessile; 2 in the cluster.
    Spikelets
    Companion sterile spikelets well-developed; containing empty lemmas, or male; oblong; asymmetrical; dorsally compressed; 6.5-8 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet glumes united below; coriaceous; thinner on margins; glandular; 7 -veined; tuberculate; lobed; 2 -fid; obtuse; muticous. Companion sterile spikelet lemmas 2; exserted from glumes; muticous. Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 6.5-8 mm long; falling entire; deciduous with accessory branch structures.
    Sterile
    Companion sterile spikelets well-developed; containing empty lemmas, or male; oblong; asymmetrical; dorsally compressed; 6.5-8 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet glumes united below; coriaceous; thinner on margins; glandular; 7 -veined; tuberculate; lobed; 2 -fid; obtuse; muticous. Companion sterile spikelet lemmas 2; exserted from glumes; muticous.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 6.5-8 mm long; falling entire; deciduous with accessory branch structures.
    Glume
    Glumes connate along margins below; shorter than spikelet; firmer than fertile lemma. Lower glume oblong; asymmetrical; coriaceous; much thinner above; much thinner on margins; black; glandular; 1-keeled; 7 -veined. Lower glume surface tuberculate. Lower glume apex lobed; 2 -fid; awned; 1 -awned. Lower glume awn 5-6 mm long. Upper glume oblong; asymmetrical; coriaceous; much thinner above; with membranous margins; black; glandular; 1-keeled; 7 -veined. Upper glume surface tuberculate. Upper glume apex lobed; 2 -fid; awned; 1 -awned. Upper glume awn 5-6 mm long.
    Florets
    Fertile florets female. Fertile lemma ovate; laterally compressed; 6-7.5 mm long; cartilaginous; keeled; 3 -veined. Lemma apex caudate.
    Flowers
    Anthers 3; 3-3.5 mm long.
    Distribution
    North America: south-central USA and Mexico.
    Reference
    Cynodonteae. Swallen.

    Distribution

    Native to:

    Mexico Northeast, New Mexico, Texas

    Other Data

    Hilaria swallenii Cory appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Hinton, G.B. [12029], Michoacán K000476017
    Hinton, G.B. [12029], Michoacán K000476018
    Hinton, G.B. [6707], Guerrero K000476019
    Hinton, G.B. [6437], Guerrero K000476020
    Hinton, G.B. [4733], México State K000476021

    Bibliography

    First published in Wrightia 1: 215 (1948)

    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.
    • 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.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

    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.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. 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 2020. 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