Poaceae
Microstegium

Microstegium tenue (Trin.) Hosok.

First published in Trans. Nat. Hist. Soc. Formosa 28: 150 (1938)
This species is accepted
The native range of this species is Taiwan, Philippines (Luzon) Caroline Islands (Kosrae). It is an annual and grows primarily in the seasonally dry tropical biome.

Descriptions

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]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/44393430/44447314

Conservation
DD - data deficient
[IUCN]

Morphology General Habit
Annual. Culms rambling; 20-100 cm long; rooting from lower nodes. Ligule an eciliate membrane. Leaf-blades linear, or lanceolate; 4-20 cm long; 4-8 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 2-4; digitate; 2-5 cm long. Rhachis fragile at the nodes; ciliate on margins. Rhachis internodes pyriform; 1.5-2 mm long. Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; the upper smaller. Pedicels clavate; 1.5 mm long; ciliate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2-3 mm long; falling entire; deciduous from the base and with accessory branch structures. Spikelet callus pubescent; base obtuse; attached transversely.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2-3 mm long; falling entire; deciduous from the base and with accessory branch structures. Spikelet callus pubescent; base obtuse; attached transversely.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; coriaceous; 2-keeled; keeled obtusely. Lower glume surface with a longitudinal median groove; puberulous; hairy at apex. Lower glume apex emarginate. Upper glume elliptic; 1-keeled. Upper glume apex acute; awned; 1 -awned. Upper glume awn 1-3 mm long.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 1.5 mm long; hyaline. Fertile lemma lanceolate; 0.3 mm long; hyaline; without keel; 0 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 8-12 mm long overall; with twisted column. Palea absent or minute.
Distribution
Asia-tropical: Malesia. Pacific: northwestern.
Reference
Andropogoneae. WDC 1997.
[GB]

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/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/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