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  1. Family: Poaceae Barnhart
    1. Cryptochloa Swallen

      1. This genus is accepted, and its native range is S. Mexico to S. Tropical America.

    [GB]

    nonem

    Habit
    Perennial. Rhizomes absent (6), or short (2). Culms erect (1/4), or geniculately ascending (2/4), or decumbent (2/4); 10-42.18-100 cm long; firm (6), or wiry (2); rooting from lower nodes (1/1). Culm-nodes constricted (1/2), or swollen (1/2). Lateral branches ample (1/1). Leaf-sheath auricles absent (6), or erect (3). Ligule an eciliate membrane (5), or a ciliolate membrane (3). Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades linear (1), or lanceolate (4), or elliptic (3), or oblong (4), or ovate (1). Leaf-blade midrib conspicuous (1/1).
    Inflorescences
    Monoecious; with male and female spikelets in the same inflorescence (6), or with male and female spikelets in different inflorescences (1), or with male terminal and mixed axillary inflorescences (1). Inflorescence a panicle (4), or composed of racemes (2), or comprising only a few spikelets (2); terminal and axillary (4), or axillary (4); embraced at base by subtending leaf (7), or enclosed (1). Panicle contracted (4/4). Racemes single (1/2), or paired (1/2); bearing few fertile spikelets (2/2); bearing 2 fertile spikelets on each (1/2), or 3-4 fertile spikelets on each (2/2). Sexes segregated (7/7); on unisexual branches (5/5); with male conjugate (1/7), or below (6/7). Spikelets solitary (6), or in threes (2). Fertile spikelets pedicelled; 1-2 in the cluster (1/2). Male spikelets sessile (1), or pedicelled (7); 1-2 in a cluster (2/3). Pedicels filiform (2/7), or linear (1/7), or clavate (6/7), or cuneate (1/7). Male inflorescence terminal (1/1); similar to female (1/1); a panicle (1/1). Male spikelets distinct from female; linear (3/7), or lanceolate (1/7), or elliptic (1/7), or oblong (2/7). Male spikelet glumes absent. Male spikelet lemma muticous (7), or awned (1).
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate (6), or elliptic (1), or oblong (1); dorsally compressed; 7-11.1-20 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident (7), or elongated (1).
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate (6), or elliptic (1), or oblong (1); dorsally compressed; 7-11.1-20 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident (7), or elongated (1).
    Glume
    Glumes deciduous; reaching apex of florets (1), or exceeding apex of florets (7); thinner than fertile lemma. Lower glume linear (1), or lanceolate (5), or elliptic (1), or ovate (2); 1-1.018-1.2 length of upper glume; membranous; without keels; 3 -veined (2), or 4 -veined (1), or 5 -veined (6), or 6 -veined (1), or 7 -veined (2), or 8-9 -veined (1). Lower glume lateral veins obscure (1), or distinct (7). Lower glume surface smooth (6), or asperulous (1), or scabrous (2); glabrous (7), or pubescent (1). Lower glume apex acute (2), or acuminate (6); muticous (7), or awned (3). Upper glume linear (1), or lanceolate (5), or elliptic (1), or ovate (2); 1-1.35-1.7 length of adjacent fertile lemma; membranous; without keels; 3 -veined (1), or 5 -veined (6), or 6 -veined (2), or 7 -veined (3), or 8-9 -veined (1). Upper glume lateral veins with cross-veins (4/4). Upper glume surface smooth (6), or asperulous (1), or scabrous (2); glabrous (7), or pubescent (1). Upper glume apex acute (2), or acuminate (6); muticous (7), or mucronate (1), or awned (3); 1 -awned (3/3).
    Florets
    Fertile florets female. Fertile lemma lanceolate (4), or elliptic (1), or ovate (3); indurate; without keel; 5 -veined (4/4). Lemma surface smooth (7), or papillose (1). Lemma margins involute. Lemma apex acute; without ornament (7), or pubescent (1). Palea not rolled (4), or involute (4); 1 length of lemma; indurate; 2 -veined (3/3), or 3-4 -veined (1/3).
    Flowers
    Lodicules 3; membranous (7), or fleshy (1); truncate (1/1). Anthers 2 (1), or 3 (7). Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp (5/6), or tardily free pericarp (1/6); fusiform (1/4), or ellipsoid (2/4), or ovoid (2/4); dorsally compressed (2/2). Embryo 0.15-0.1833-0.2 length of caryopsis. Hilum linear (3/3); 1 length of caryopsis.
    Male
    Male inflorescence terminal (1/1); similar to female (1/1); a panicle (1/1). Male spikelets distinct from female; linear (3/7), or lanceolate (1/7), or elliptic (1/7), or oblong (2/7). Male spikelet glumes absent. Male spikelet lemma muticous (7), or awned (1).
    Distribution
    North America (1), or South America.

    Images

    Distribution

    Native to:

    Belize, Bolivia, Brazil North, Brazil Northeast, Brazil Southeast, Brazil West-Central, Colombia, Costa Rica, Ecuador, French Guiana, Guatemala, Honduras, Mexico Gulf, Mexico Southeast, Mexico Southwest, Nicaragua, Panamá, Peru

    Accepted Species

    Other Data

    Cryptochloa Swallen appears in other Kew resources:

    Bibliography

    First published in Ann. Missouri Bot. Gard. 29: 317 (1942)

    Accepted by

    • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

    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