Global Menu

  • Neon Science
  • Data Portal
  • Biorepository
  • NSF NEON | Open Data to Understand our Ecosystems
  • Biorepository Data Portal

  • Search
    • Sample search
    • Map search
    • Dynamic Species List
    • Taxonomic Explorer
  • Images
    • Image Browser
    • Image Search
  • Checklists
    • Research Sites - Invertebrates
    • Research Sites - Plants
    • Research Sites - Vertebrates
  • Sample Use
    • Sample Use Policy
    • Sample Request
    • Data Usage Policy
  • Additional Information
    • Tutorials and Help
    • About NEON
    • NEON Data Portal
    • ASU Biocollections
    • About Symbiota
  • Getting Started
Login New Account Sitemap
Triplasis
Family: Poaceae
Triplasis image
  • FNA
  • Gleason & Cronquist
  • Web Links
Stephan L. Hatch. Flora of North America
Plants annual or perennial; cespitose, occasionally rhizomatous. Culms 14-100 cm, ascending to erect; nodes pubescent to hirsute. Sheaths open; auricles absent; ligules of hairs or membranous and ciliate; blades 1-5 mm wide, flat or involute. Primary inflorescences terminal, open panicles, with few spikelets, exserted or partially included in the upper sheath, apices exceeding the upper leaf blades, axillary panicles sometimes also present; cleistogamous inflorescences also present in the upper sheaths. Spikelets laterally compressed, purplish, with 2-5 florets; sterile florets above the fertile florets; rachillas prolonged; disarticulation above the glumes and beneath the florets and, subsequently, at the cauline nodes. Glumes equal or unequal, shorter than the first lemma, 1-veined, keeled; calluses hairy; lemmas 3-veined, veins villous, apices bilobed to incised, midveins sometimes extending into an awn, awns to 11 mm; paleas bowed-out, keels hairy, distal hairs 0.5-2 mm, longer than those below; lodicules 2, truncate; anthers 3, yellow or reddish-purple; stigmas pink to purple. Caryopses dorsiventrally compressed. x = 10. Name from the Greek triplasios, triple, alluding to the awn and long lobes of the type species, Triplasis americana.
Vascular plants of NE US and adjacent Canada
Spikelets 2-6-fld, with long rachilla-joints, disarticulating above the glumes and between the lemmas; glumes chiefly equal, 1-veined, acute, smooth; lemmas oblong, rounded on the back, hairy on the 3 parallel veins, 2-lobed with an awn between the lobes; palea shorter than and soon diverging from the lemma, densely villous on the 2 keels in the upper half; tufted grasses with many short internodes, loose sheaths, a ligule of short hairs, and short panicles at first included in the upper sheath, eventually exsert with spreading branches. 2, N. Amer.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
  • BOLD Systems - Barcode of Life Data Systems
  • Encyclopedia of Life
  • Flora of North America
  • Google Images
  • Google Search Engine
  • International Plant Names Index
  • NCBI - National Center for Biotechnology Information
  • USDA PLANTS Database
  • W3Tropicos
Species within checklist: Arikaree River (ARIK) plants - Central Plains (D10)
Triplasis purpurea
Image of Triplasis purpurea
Map not
Available
NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.