1. Family: Poaceae Barnhart
    1. Tripsacum L.

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

    [GB]

    nonem

    Habit
    Perennial. Rhizomes absent (4), or short (8), or elongated (2). Culms erect (10), or geniculately ascending (7), or decumbent (2); robust (10/13), or of moderate stature (4/13); 50-283.4-500 cm long; without nodal roots (2/3), or with prop roots (3/3). Leaf-sheath auricles absent (13), or erect (1). Ligule a ciliolate membrane. Leaf-blade base without a false petiole (11), or with a false petiole (3). Leaf-blades linear (11), or lanceolate (3); herbaceous (13), or coriaceous (1).
    Inflorescences
    Monoecious; with male and female spikelets in the same inflorescence. Inflorescence composed of racemes; terminal and axillary. Racemes single (5), or paired (4), or digitate (12); erect (7), or ascending (3), or spreading (1), or drooping (3); unilateral; bearing 4-12 fertile spikelets on each (1/1). Rhachis fragile at the nodes; subcylindrical and excavated. Spikelet packing abaxial. Rhachis internodes oblong; adherent to upper glume of sessile spikelet. Rhachis internode tip transverse; crateriform. Sexes segregated; on bisexual branches; with male above. Spikelets sunken; solitary. Fertile spikelets sessile. Male spikelets sessile (8), or sessile and pedicelled (8); 2 in a cluster.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong (1), or ovate (13); dorsally compressed; 3-6.016-10 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely. Male spikelets distinct from female; lanceolate (2/2), or elliptic (2/2). Male spikelet glumes 2; muticous.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong (1), or ovate (13); dorsally compressed; 3-6.016-10 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely.
    Glume
    Glumes reaching apex of florets; firmer than fertile lemma. Lower glume ovate; indurate; without keels. Lower glume apex acute (7/9), or acuminate (2/9). Upper glume ovate; cartilaginous; without keels. Upper glume apex acute (9/9).
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline. Fertile florets female. Fertile lemma oblong; hyaline; without keel. Palea hyaline.
    Flowers
    Anthers 3 (1/1).
    Male
    Male spikelets distinct from female; lanceolate (2/2), or elliptic (2/2). Male spikelet glumes 2; muticous.
    Distribution
    Africa (1), or Tropical Asia (2), or Australasia (1), or Pacific (1), or North America (12), or South America (13).

    Images

    Distribution

    Native to:

    Alabama, Arizona, Arkansas, Bahamas, Belize, Bolivia, Brazil North, Brazil Northeast, Brazil Southeast, Brazil West-Central, Colombia, Connecticut, Costa Rica, Cuba, Delaware, District of Columbia, Dominican Republic, Ecuador, El Salvador, Florida, French Guiana, Georgia, Guatemala, Guyana, Haiti, Honduras, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Masachusettes, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southeast, Mexico Southwest, Michigan, Mississippi, Missouri, Nebraska, New Jersey, New Mexico, New York, Nicaragua, North Carolina, Ohio, Oklahoma, Panamá, Paraguay, Pennsylvania, Peru, Rhode I., South Carolina, Suriname, Tennessee, Texas, Trinidad-Tobago, Venezuela, Virginia, West Virginia

    Introduced into:

    Andaman Is., Borneo, Cameroon, Congo, Fiji, Gabon, Guinea, India, Ivory Coast, Jamaica, Jawa, Leeward Is., Lesser Sunda Is., Madagascar, Malaya, Marianas, New Caledonia, Niue, Philippines, Puerto Rico, Queensland, Rwanda, Seychelles, Sierra Leone, Society Is., Solomon Is., Sri Lanka, Taiwan, Tanzania, Victoria, Vietnam

    Tripsacum L. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Hatschbach, G. [62353], Brazil K001106263
    Hatschbach, G. [62353], Brazil K001106264

    First published in Syst. Nat. ed. 10, 2: 1261 (1759)

    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 2018. 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 2018. 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