Hygroryza aristata (Retz.) Nees ex Wight & Arn.

First published in Edinburgh New Philos. J. 15: 380 (1833)
This species is accepted
The native range of this species is Indian Subcontinent to S. China and Ind-China, Taiwan. It is a perennial and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial. Stolons present. Culms prostrate; 5-20 cm long; spongy; rooting from lower nodes. Leaf-sheaths inflated; longer than adjacent culm internode. Ligule an eciliate membrane. Leaf-blade base cordate. Leaf-blades floating; elliptic, or oblong, or ovate; 2.5-5 cm long; 12-15 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; pyramidal; 3-5 cm long. Primary panicle branches whorled at lower nodes. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 6-7 mm long; falling entire. Floret callus elongated; 2-10 mm long.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 6-7 mm long; falling entire. Floret callus elongated; 2-10 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes both absent or obscure.
Morphology Reproductive morphology Flowers Florets
Fertile lemma linear; 6-7 mm long; chartaceous; keeled; 5 -veined. Lemma midvein ciliate. Lemma margins ciliate. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 5-10 mm long overall. Palea lanceolate; 1 length of lemma; chartaceous; 3 -veined; 1-keeled. Palea keels ciliate.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 6.
Distribution
Asia-temperate: China and eastern Asia. Asia-tropical: India and Indo-China.
Reference
Oryzeae. Fl Cey.
[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

    • 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 2024. 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 2024. 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