Poaceae
Panicum

Panicum oligoadenotrichum A.Camus

First published in Bull. Soc. Bot. France 108: 160 (1961)
This species is accepted
The native range of this species is Madagascar. 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: threatened. Confidence: confident
[AERP]

Morphology General Habit
Annual. Culms erect; slender; 50-70 cm long. Culm-internodes distally glabrous. Culm-nodes pubescent. Lateral branches ample. Leaf-sheaths mostly shorter than adjacent culm internode; striately veined; puberulous. Leaf-sheath oral hairs scanty. Ligule an eciliate membrane. Leaf-blades linear, or lanceolate; 6-11 cm long; 8-10 mm wide. Leaf-blade venation prominent; with 4-6 secondary veins; with obscure cross veins. Leaf-blade surface glabrous, or puberulous. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; pyramidal; effuse; 12-15 cm long; 7-10 cm wide. Primary panicle branches spreading; 1 -nate; 4-5 cm long. Panicle branches pilose; with capitate hairs. Spikelets in pairs. Fertile spikelets pedicelled. Pedicels 0.1-4 mm long; bearing a few hairs.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; subacute; 3 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; subacute; 3 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes similar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; clasping; 1.4-1.5 mm long; 0.5 length of spikelet; membranous; without keels; 5 -veined. Lower glume apex obtuse. Upper glume ovate; 1 length of spikelet; membranous; without keels; 9 -veined.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous. Fertile lemma lanceolate, or oblong; dorsally compressed; 1.2-1.4 mm long; indurate; pallid; without keel. Lemma surface granulose. Lemma margins involute. Lemma apex mucronate. Palea involute; indurate.
Distribution
Africa: western Indian ocean.
Reference
Paniceae. Camus 2007.
[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

  • 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