1. Family: Poaceae Barnhart
    1. Genus: Hilaria Kunth
      1. Hilaria mutica (Buckley) Benth.

        This species is accepted, and its native range is California to Oklahoma and N. Mexico.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short. Culms erect; 30-50 cm long. Culm-internodes distally glabrous. Culm-nodes pubescent. Leaf-sheaths longer than adjacent culm internode; striately veined; antrorsely scabrous; outer margin glabrous, or hairy. Ligule an eciliate membrane; 1 mm long; lacerate. Leaf-blades flat, or involute; 5-10 cm long; 2-4 mm wide; stiff. Leaf-blade surface ribbed; scabrous; rough on both sides; glabrous, or pilose; hairy on both sides.
    Inflorescences
    Inflorescence composed of racemes. Racemes borne along a central axis; closely spaced; in a multilateral false spike; cuneate; unilateral; 0.6-0.9 cm long; bearing a triad of spikelets. Central inflorescence axis 4-8 cm long. Rhachis obsolete; deciduous from axis. Raceme-bases brief; pilose. Spikelets in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets sessile; 2 in the cluster.
    Sterile
    Companion sterile spikelets well-developed; male; cuneate; asymmetrical; dorsally compressed; 4-8 mm long; shorter than fertile; deciduous with the fertile. Companion sterile spikelet glumes free; membranous; 4-7 -veined; dentate; 2-7 -fid; muticous. Companion sterile spikelet lemmas 1-2; exserted from glumes; dentate; muticous.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 6-8 mm long; falling entire; deciduous with accessory branch structures. Companion sterile spikelets well-developed; male; cuneate; asymmetrical; dorsally compressed; 4-8 mm long; shorter than fertile; deciduous with the fertile. Companion sterile spikelet glumes free; membranous; 4-7 -veined; dentate; 2-7 -fid; muticous. Companion sterile spikelet lemmas 1-2; exserted from glumes; dentate; muticous.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 6-8 mm long; falling entire; deciduous with accessory branch structures.
    Glume
    Glumes free; shorter than spikelet. Lower glume oblong; asymmetrical; membranous; pallid; 1-keeled; 7 -veined. Lower glume margins ciliolate. Lower glume apex lobed; 5 -fid; awned; 7 -awned. Lower glume awn terminal and dorsal; 1-2 mm long; ciliolate. Upper glume oblong; asymmetrical; 0.6-0.75 length of adjacent fertile lemma; membranous; pallid; 1-keeled; 7 -veined. Upper glume margins ciliolate. Upper glume apex lobed; 5 -fid; awned; 7 -awned. Upper glume awn terminal and dorsal; 1-2 mm long; ciliate.
    Florets
    Fertile florets bisexual. Fertile lemma lanceolate; laterally compressed; 6-8 mm long; cartilaginous; keeled; 3 -veined. Lemma apex dentate; 2 -fid; obtuse; mucronate, or awned; 1 -awned. Principal lemma awn from a sinus; 1 mm long overall.
    Flowers
    Lodicules 2; 0.1-0.2 mm long. Anthers 3.
    Distribution
    North America: southwest USA, south-central USA, and Mexico.
    Reference
    Cynodonteae. Swallen.

    Images

    Distribution

    Native to:

    Arizona, California, Mexico Northeast, Mexico Northwest, New Mexico, Oklahoma, Texas

    Hilaria mutica (Buckley) Benth. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Wright, C. [2108], New Mexico K000674279
    Wright, C. [2108], New Mexico K000674280
    Wright, C. [760], USA K000674281
    Wright, C. [760], USA K000674282

    First published in J. Linn. Soc., Bot. 19: 62 (1881)

    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.
    • 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.
    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 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