Microstegium petiolare (Trin.) Bor

First published in Indian Forest Rec., Bot., n.s., 1: 87 (1938)
This species is accepted
The native range of this species is Himalaya to China (Yunnan). It is a perennial and grows primarily in the subtropical 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]

Morphology General Habit
Perennial. Culms rambling, or scandent; 60-100(-400) cm long; rooting from lower nodes. Culm-nodes pubescent. Leaf-sheaths outer margin hairy. Ligule an eciliate membrane; 3-6 mm long. Leaf-blade base with a false petiole. Leaf-blades lanceolate, or elliptic; 5-30 cm long; 10-25 mm wide. Leaf-blade surface pilose; sparsely hairy; with tubercle-based hairs. Leaf-blade margins scabrous. Leaf-blade apex acuminate; filiform.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Peduncle glabrous, or pubescent above. Racemes 8-20; digitate; 6-10 cm long. Rhachis fragile at the nodes; ciliate on margins. Rhachis internodes filiform; 3-4.5 mm long. Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels filiform; angular; ciliate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 4.5-5 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; dorsally compressed; 4.5-5 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; coriaceous; 2-keeled; keeled obtusely; 6-8 -veined. Lower glume primary vein scabrous. Lower glume surface with a longitudinal median groove; scabrous. Lower glume apex acute. Upper glume oblong; membranous, or chartaceous; 1-keeled; 1-3 -veined. Upper glume primary vein scabrous. Upper glume apex acute; muticous.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male, or barren; with palea. Lemma of lower sterile floret linear; 3-4 mm long; hyaline; ciliate on margins; obtuse. Palea of lower sterile floret 0.5-0.66 length of lemma. Fertile lemma oblong; 3 mm long; hyaline; without keel. Lemma apex lobed; 2 -fid; incised 0.5 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 4-6 mm long overall; with twisted column. Palea 1 length of lemma; hyaline. Palea surface pilose; hairy on flanks.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3; 2.5-3 mm long.
Distribution
Asia-temperate: China. Asia-tropical: India and Indo-China.
Reference
Andropogoneae. Bor.
[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

    • 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