Poaceae
Glyceria

Glyceria acutiflora Torr.

First published in Fl. N. Middle United States 1: 104 (1823)
This species is accepted
The native range of this species is S. China to Temp. E. Asia, E. Central & E. U.S.A. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial. Culms decumbent; 50-100 cm long. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 4-6 mm long. Leaf-blades 8-20 cm long; 3-7 mm wide. Leaf-blade surface ribbed; scabrous; rough adaxially; glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; exserted, or embraced at base by subtending leaf. Panicle open; elliptic; 15-40 cm long. Primary panicle branches appressed, or ascending; 1-2 -nate; 5-10 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1-3 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5-9 fertile florets; with diminished florets at the apex. Spikelets linear; subterete; 15-40 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 5-9 fertile florets; with diminished florets at the apex. Spikelets linear; subterete; 15-40 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume oblong; 2-3 mm long; 0.66 length of upper glume; hyaline; much thinner on margins; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume oblong; 3.5-5 mm long; 0.5-0.66 length of adjacent fertile lemma; hyaline; with hyaline margins; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 7.5 mm long; membranous; without keel; 7 -veined. Lemma surface scabrous; rough generally. Lemma apex acute. Palea 1.2 length of lemma; 2 -veined. Palea keels scabrous. Palea apex dentate; 2 -fid; acuminate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; united; oblong; fleshy; truncate. Anthers 3; 1.3-1.6 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; oblong; 3.5 mm long. Hilum linear.
Distribution
Asia-temperate: China and eastern Asia. North America: north-central USA, northeast USA, and southeast USA.
Reference
Meliceae. Gr Indiana 1994.
[GB]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). 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 Vascular Plants 2026. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2026. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0