1. Family: Poaceae Barnhart
    1. Genus: Danthonia DC.
      1. Danthonia chiapasensis Davidse

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

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Basal innovations intravaginal. Culms erect; 40-60 cm long. Leaves basal and cauline. Leaf-sheaths without keel; glabrous on surface. Leaf-sheath oral hairs ciliate; 0.7-1.1 mm long. Ligule a fringe of hairs; 0.5-1.5 mm long. Leaf-blades involute; 20-45 cm long; 2-5 mm wide. Leaf-blade surface ribbed; grooved adaxially; glabrous, or pilose; sparsely hairy.
    Inflorescences
    Inflorescence a panicle. Panicle open; linear; 8-13 cm long; 1.5 cm wide. Primary panicle branches ascending; 3-7 cm long. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 5-6 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 17-21 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pilose. Floret callus hairs 0.5-1 mm long.
    Fertile
    Spikelets comprising 5-6 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 17-21 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pilose. Floret callus hairs 0.5-1 mm long.
    Glume
    Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate; 17-21 mm long; 1 length of upper glume; membranous; without keels; 3-5 -veined. Lower glume apex acuminate. Upper glume lanceolate; 17-21 mm long; 1.4-1.5 length of adjacent fertile lemma; membranous; without keels; 3-5 -veined. Upper glume apex acuminate.
    Florets
    Fertile lemma elliptic; 12-14 mm long; chartaceous; without keel; 9 -veined. Lemma surface pilose; hairy below. Lemma margins ciliate; hairy below. Lemma apex lobed; 2 -fid; with lobes 8-9.5 mm long; incised 0.66 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; flat below; 20-25 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; shorter than principal. Palea 6 mm long; 2 -veined. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; obovate; fleshy; ciliate. Anthers 3; 1.7-3.4 mm long.
    Fruits
    Caryopsis with adherent pericarp. Hilum linear.
    Distribution
    North America: Mexico.
    Reference
    Arundineae. Davidse 1994.

    Distribution

    Native to:

    Mexico Southeast

    Danthonia chiapasensis Davidse appears in other Kew resources:

    First published in Novon 2: 100 (1992)

    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