1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum aztecanum Zuloaga & Morrone

        This species is accepted, and its native range is W. & Central Mexico.

    [GB]
    Habit
    Perennial; caespitose. Culms erect; 50-100 cm long. Culm-internodes terete; 13-16 cm long. Culm-nodes glabrous. Leaf-sheaths 2-10 cm long; mostly shorter than adjacent culm internode; glabrous on surface, or pilose; outer margin glabrous. Leaf-sheath oral hairs ciliate; 2-3.6 mm long. Ligule a ciliate membrane; 0.4-0.6 mm long. Collar glabrous, or pubescent. Leaf-blades filiform, or linear; involute; 14-30 cm long; 1-3 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy adaxially, or on both sides. Leaf-blade margins scaberulous. Leaf-blade apex acute.
    Inflorescences
    Inflorescence a panicle. Peduncle 25-48 cm long; glabrous. Panicle open; pyramidal; effuse; 15-18 cm long; 8-10 cm wide. Panicle axis glabrous. Panicle branches glabrous in axils. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 3.7-4.5 mm long; 1.5 mm wide; falling entire. Rhachilla internodes elongated between glumes. Rhachilla elongation 0.5 mm long.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 3.7-4.5 mm long; 1.5 mm wide; falling entire. Rhachilla internodes elongated between glumes. Rhachilla elongation 0.5 mm long.
    Glume
    Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; not clasping; 2-3 mm long; 0.5-0.75 length of spikelet; membranous; without keels; 7 -veined. Lower glume primary vein scaberulous. Lower glume apex acuminate. Upper glume elliptic; 3.2-4.2 mm long; 1 length of spikelet; membranous; without keels; 7-9 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; elliptic; 3-4 mm long; 1 length of spikelet; membranous; 7-9 -veined; acute. Palea of lower sterile floret 1.7-2.7 mm long. Fertile lemma ovate; dorsally compressed; 2.4-3 mm long; 0.9-1.2 mm wide; indurate; yellow; shiny; without keel; 7 -veined. Lemma margins involute. Palea involute; indurate.
    Flowers
    Anthers 3; 1.3 mm long.
    Fruits
    Caryopsis with adherent pericarp; ovoid; 1.8 mm long; pallid. Embryo 0.5 length of caryopsis. Hilum punctiform.
    Distribution
    North America: Mexico.
    Reference
    Paniceae. Zuloaga 2001.

    Distribution

    Native to:

    Mexico Central, Mexico Northwest, Mexico Southwest

    Panicum aztecanum Zuloaga & Morrone appears in other Kew resources:

    First published in Ann. Missouri Bot. Gard. 83: 229 (1996)

    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 2019. 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 2019. 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