Skip to main content
  1. Family: Poaceae Barnhart
    1. Polytrias Hack.

      1. This genus is accepted, and its native range is W. & W. Central Tropical Africa, Seychelles,Tropical & Subtropical Asia to W. Pacific.

    [GB]

    nonem

    Habit
    Perennial. Culms prostrate; 10-30 cm long; rooting from lower nodes. Ligule a ciliolate membrane. Leaf-blades lanceolate.
    Inflorescences
    Inflorescence composed of racemes. Racemes single. Rhachis fragile at the nodes; flattened. Rhachis internodes linear. Spikelets in threes. Fertile spikelets sessile and pedicelled; 3 in the cluster. Pedicels linear.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 4-5 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus base truncate; attached transversely.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 4-5 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus base truncate; attached transversely.
    Glume
    Glumes reaching apex of florets; firmer than fertile lemma. Lower glume oblong; cartilaginous; 2-keeled; 6 -veined. Lower glume intercarinal veins distinct. Lower glume surface pilose. Lower glume apex truncate. Upper glume oblong; without keels; 3 -veined. Upper glume surface pilose. Upper glume apex truncate.
    Florets
    Fertile lemma oblong; hyaline; firmer above; without keel; 1 -veined. Lemma apex dentate; 2-3 -fid; incised 0.3 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate. Palea absent or minute.
    Distribution
    Africa, or Temperate Asia, or Tropical Asia, or Australasia, or Pacific, or South America.

    Images

    Distribution

    Native to:

    Andaman Is., Bangladesh, Borneo, Burkina, Cameroon, Caroline Is., China Southeast, Fiji, Hainan, India, Ivory Coast, Jawa, Lesser Sunda Is., Liberia, Malaya, Marianas, Myanmar, New Guinea, Nicobar Is., Nigeria, Philippines, Seychelles, Sierra Leone, Sri Lanka, Sumatera, Thailand, Vietnam, Wallis-Futuna Is., West Himalaya

    Introduced into:

    Colombia, Costa Rica, Florida, Guatemala, Guyana, Hawaii, Maryland, Panamá, Puerto Rico, Suriname, Trinidad-Tobago

    Accepted Species

    Synonyms

    Other Data

    Polytrias Hack. appears in other Kew resources:

    Bibliography

    First published in H.G.A.Engler & K.A.E.Prantl, Nat. Pflanzenfam. 2(2): 24 (1889)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of 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