Poaceae
Schizostachyum

Schizostachyum mekongensis (A.Camus) K.M.Wong & Sungkaew

First published in Phytotaxa 472: 117 (2020)
This species is accepted
The native range of this species is Laos. It is a bamboo and grows primarily in the wet 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: threatened. Confidence: confident
[AERP]

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms 1000-1500 cm long; woody. Culm-internodes terete. Lateral branches dendroid. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 17-30 cm long; 25-40 mm wide.
Morphology Reproductive morphology Inflorescences
Synflorescence bractiferous; clustered at the nodes; in untidy tufts; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafless between clusters; 40-50 cm long overall. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear, or oblong; laterally compressed; 22-24 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 2 mm long.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear, or oblong; laterally compressed; 22-24 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 2 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes several; 3-4 empty glumes; persistent; shorter than spikelet. Upper glume lanceolate, or ovate; 5-9 mm long; chartaceous; without keels. Upper glume apex acute; mucronate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 14-17 mm long; chartaceous; without keel. Lemma lateral veins obscure. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1-2 mm long overall. Palea 17-19 mm long; chartaceous; without keels. Palea apex awned; awns 2 mm long.
Morphology Reproductive morphology Flowers
Lodicules absent. Anthers 6; 8 mm long; anther tip smooth. Filaments united in a tube. Stigmas 3. Styles 12-15 mm long. Ovary with a steeple-like appendage.
Morphology Reproductive morphology Fruits
Caryopsis with free brittle pericarp.
Distribution
Asia-tropical: Indo-China.
Reference
Bambuseae. Lecomte 1996.
[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