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

        This species is accepted, and its native range is Revillagigedo Islands.

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Culms erect; 60 cm long; 1 mm diam. Leaf-sheaths without keel; glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs. Leaf-blades involute; 10-20 cm long; 1-1.5 mm wide. Leaf-blade surface glabrous; hairless except near base. Leaf-blade margins cartilaginous. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; linear; 15-20 cm long. Primary panicle branches appressed; 5 cm long. Panicle axis scaberulous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 10-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.5 mm long; pubescent; obtuse.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 10-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.5 mm long; pubescent; obtuse.
    Glume
    Glumes similar; reaching apex of florets, or exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 10-12 mm long; 1 length of upper glume; membranous; 3 -veined. Lower glume surface scabrous; rough on veins. Lower glume apex setaceously attenuate. Upper glume lanceolate; 10-11 mm long; membranous; 3 -veined. Upper glume lateral veins obscure. Upper glume surface smooth. Upper glume apex setaceously attenuate.
    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; with 10-15 mm long limb; with a straight or slightly twisted column. Column of lemma awn 2-3 mm long. Lateral lemma awns 10-15 mm long; subequal to principal.
    Distribution
    North America: Mexico.
    Reference
    Aristideae. Hitchcock 2004.

    Images

    Distribution

    Native to:

    Mexican Pacific Is.

    Aristida tenuifolia Hitchc. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Howell, J.T. [8361], Revillagigedo Is. K000906128

    First published in Proc. Calif. Acad. Sci., ser. 4, 21: 296 (1935)

    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

    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