Poaceae
Glyceria

Glyceria tonglensis C.B.Clarke

First published in J. Linn. Soc., Bot. 15: 119 (1876)
This species is accepted
The native range of this species is Himalaya to S. China and N. Myanmar. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; culms solitary, or caespitose. Rhizomes elongated. Culms decumbent, or prostrate; 20-80 cm long; rooting from lower nodes. Leaf-sheaths tubular for much of their length; with 1 of their length closed; smooth; glabrous on surface. Ligule an eciliate membrane; 1-3 mm long. Leaf-blades flat, or conduplicate; 10-30 cm long; 2-4 mm wide. Leaf-blade surface scaberulous; rough on both sides. Leaf-blade margins scabrous. Leaf-blade apex obtuse, or abruptly acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate, or ovate; 10-30 cm long. Primary panicle branches appressed, or spreading (after anthesis); 3-10 cm long. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 6-8.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 4-6 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 6-8.5 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 ovate; 1-1.5 mm long; 0.66 length of upper glume; membranous; without keels. Lower glume apex entire, or erose; acute. Upper glume ovate; 1.5-2.5 mm long; 0.5-0.66 length of adjacent fertile lemma; membranous; without keels. Upper glume apex entire, or erose; acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong, or ovate; 3-3.5 mm long; membranous; much thinner above; without keel; 7 -veined. Lemma surface asperulous; rough on veins. Lemma apex erose; obtuse. Palea 2 -veined. Palea keels wingless. Palea apex dentate; 2 -fid. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; united; oblong; fleshy; truncate. Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum linear.
Distribution
Asia-temperate: China. Asia-tropical: India.
Reference
Meliceae. Fl Pak 1993.
[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 2025. 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 2025. 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