Microstegium eucnemis (Nees ex Steud.) A.Camus

First published in Ann. Soc. Linn. Lyon, n.s., 68: 200 (1922)
This species is accepted
The native range of this species is Tropical Asia. It is an annual or perennial and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Perennial. Culms erect; 90-130 cm long. Culm-nodes glabrous. Ligule a fringe of hairs. Leaf-blade base with a false petiole. Leaf-blades elliptic; 10-25 cm long; 10-25 mm wide. Leaf-blade surface pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes (1-)3-25; digitate; 5-9 cm long. Rhachis fragile at the nodes; ciliate on margins. Rhachis internodes cuneate; 3 mm long. Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels cuneate; 3 mm long; ciliate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 4 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus base obtuse; attached transversely.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 4 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus base obtuse; attached transversely.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; chartaceous; 2-keeled; keeled obtusely. Lower glume primary vein ciliate. Lower glume surface with a longitudinal median groove. Lower glume apex acute. Upper glume elliptic; chartaceous; 1-keeled; 3 -veined. Upper glume apex dentate; 2 -fid; awned; 1 -awned. Upper glume awn 0.5-1 mm long.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret absent. Palea of lower sterile floret membranous (3.5mm long); pilose; adorned on flanks. Fertile lemma linear; 1-1.25 mm long; hyaline; without keel. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 15 mm long overall; with twisted column. Palea obovate; hyaline. Palea surface pilose; hairy on flanks.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3; 3-3.5 mm long.
Distribution
Asia-tropical: Indo-China and Malesia.
Reference
Andropogoneae. Bor.
[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