1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida spanospicula Allred & Valdés-Reyna & Sánchez-Ken

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

    [GB]
    Habit
    Perennial; caespitose. Culms geniculately ascending; 20-60 cm long. Culm-internodes terete; smooth, or scaberulous; distally glabrous. Lateral branches lacking. Leaves mostly basal. Leaf-sheaths longer than adjacent culm internode; without keel; glabrous on surface, or pilose. Ligule a fringe of hairs; 0.3-0.5 mm long. Leaf-blades flat, or conduplicate; 14-25 cm long; 1.5-2 mm wide. Leaf-blade surface glabrous, or puberulous; hairy adaxially. Leaf-blade margins cartilaginous.
    Inflorescences
    Inflorescence a panicle; comprising 3-12 fertile spikelets. Panicle open; oblong; equilateral, or nodding; 8-22 cm long; 1-2 cm wide; bearing few spikelets. Primary panicle branches ascending; bearing 1-2(-4) fertile spikelets on each lower branch. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 16-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.5-1 mm long; pubescent.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 16-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.5-1 mm long; pubescent.
    Glume
    Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 9-15 mm long; 1 length of upper glume; membranous; light brown; 1 -veined. Lower glume lateral veins absent. Upper glume lanceolate; 9-15 mm long; 1-1.5 length of adjacent fertile lemma; membranous; light brown; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
    Florets
    Fertile lemma linear; subterete; 10 mm long; coriaceous; without keel; 3 -veined. Lemma surface glabrous. Lemma margins convolute; covering most of palea. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; with 10-20 mm long limb; with twisted column. Column of lemma awn 6-15 mm long. Palea 1 mm long; hyaline; 2-keeled.
    Flowers
    Lodicules 2; 1-1.5 mm long. Anthers 3; 2 mm long; brown.
    Fruits
    Caryopsis with adherent pericarp; fusiform; 7-9 mm long.
    Distribution
    North America: Mexico.
    Reference
    Aristideae. Allred et al 2004.

    Distribution

    Native to:

    Mexico Northeast, Mexico Northwest

    Aristida spanospicula Allred & Valdés-Reyna & Sánchez-Ken appears in other Kew resources:

    First published in Novon 5: 214 (1995)

    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.

    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.

    Sources

    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 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