Apocopis cochinchinensis A.Camus

First published in Bull. Mus. Natl. Hist. Nat. 25: 286 (1919)
This species is accepted
The native range of this species is Indo-China. It is an annual and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Annual. Culms erect; slender; 20-40 cm long. Leaf-sheaths keeled; pilose; with tubercle-based hairs. Ligule an eciliate membrane; 0.5-1 mm long; lacerate. Leaf-blades 2-4 cm long; 2-4 mm wide. Leaf-blade midrib keeled beneath. Leaf-blade surface glabrous, or pilose; hairy abaxially; with tubercle-based hairs. Leaf-blade margins ciliate; hairy at base. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Peduncle glabrous. Racemes 2; paired; 1-2 cm long. Rhachis fragile at the nodes; subterete; ciliate on margins. Rhachis hairs yellow; 1.75 mm long. Rhachis internodes linear; 1.75 mm long. Spikelets appressed; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels adnate at the base to lower glume of sessile spikelet; linear; 1.75 mm long; ciliate; with 2-2.5 mm long hairs.
Morphology Reproductive morphology Inflorescences Spikelets
Companion sterile spikelets represented by barren pedicels. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; truncate; 4.5-5 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; attached transversely.
Sterile
Companion sterile spikelets represented by barren pedicels.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; truncate; 4.5-5 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; attached transversely.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; firmer than fertile lemma. Lower glume lanceolate, or elliptic; 0.66 length of spikelet; coriaceous; much thinner above; much thinner on margins; yellow; without keels; 7 -veined. Lower glume primary vein extending to apex, or falling short of apex. Lower glume lateral veins all falling short of apex. Lower glume apex erose; emarginate. Upper glume oblong; 1 length of spikelet; chartaceous; yellow; 3 -veined. Upper glume lateral veins all falling short of apex. Upper glume apex truncate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret lanceolate, or oblong; 3.5 mm long; hyaline; 0 -veined; without midvein; without lateral veins. Fertile lemma oblong; 4 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 20 mm long overall; with twisted column. Column of lemma awn 10 mm long; hispidulous. Palea 4 mm long; hyaline; 0 -veined; without keels.
Morphology Reproductive morphology Flowers
Lodicules absent. Anthers 2; 2-2.5 mm long.
Distribution
Asia-tropical: Indo-China.
Reference
Andropogoneae. Bor 1992.
[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