1. Family: Poaceae Barnhart
    1. Genus: Aristida L.
      1. Aristida purpusiana Hitchc.

        This species is accepted, and its native range is Mexico (Baja California).

    [GB]
    Habit
    Perennial. Culms erect; slender; 50-60 cm long. Culm-internodes distally glabrous. Lateral branches ample. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs. Leaf-blades involute; 5-10 cm long; 1-2 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle open; pyramidal; 15-25 cm long. Primary panicle branches spreading, or reflexed; 5-6 cm long. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1 mm long; pubescent; obtuse.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1 mm long; pubescent; obtuse.
    Glume
    Glumes similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 6 mm long; 0.75 length of upper glume; membranous; 1 -veined. Lower glume lateral veins absent. Lower glume apex emarginate. Upper glume lanceolate; 5 mm long; 0.75 length of adjacent fertile lemma; membranous; 1 -veined. Upper glume lateral veins absent. Upper glume apex emarginate.
    Florets
    Fertile lemma linear; subterete; 10 mm long; coriaceous; without keel; 3 -veined. Lemma surface asperulous; rough above. Lemma margins convolute; covering most of palea. Lemma apex awned; 3 -awned. Principal lemma awn 3-branched; recurved at base of limb; with 8 mm long limb; with twisted column. Column of lemma awn 10 mm long. Lateral lemma awns 0.5-1 mm long; shorter than principal.
    Flowers
    Anthers 3.
    Distribution
    North America: Mexico.
    Reference
    Aristideae. Gr Baja Cal 1994.

    Distribution

    Native to:

    Mexico Northwest

    Aristida purpusiana Hitchc. appears in other Kew resources:

    First published in Contr. U.S. Natl. Herb. 17: 276 (1913)

    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