Poaceae
Panicum

Panicum cinctum Hack.

First published in Oesterr. Bot. Z. 51: 429 (1901)
This species is accepted
The native range of this species is Madagascar. It is a perennial 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: low confidence
[AERP]

Morphology General Habit
Perennial; caespitose. Culms erect; 20 cm long; 2-3 -noded. Lateral branches lacking. Leaves mostly basal. Ligule a ciliate membrane. Leaf-blades 3-8 cm long; 3-4 mm wide; stiff. Leaf-blade surface pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; 2-4 cm long. Primary panicle branches profusely divided. Spikelets solitary. Fertile spikelets pedicelled. Pedicels ciliate; hairy at tip.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or ovate; dorsally compressed; 1.5-2 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or ovate; dorsally compressed; 1.5-2 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.5 length of spikelet; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex cuspidate. Upper glume ovate; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 5 -veined; acute. Fertile lemma oblong; dorsally compressed; 1.5-2 mm long; coriaceous; pallid; without keel. Lemma margins involute. Lemma apex acuminate. Palea involute; coriaceous.
Distribution
Africa: western Indian ocean.
Reference
Paniceae. Hack 1994.
[GB]

Morphology General Habit
Annual. Culms erect, or geniculately ascending; 30-35 cm long. Culm-internodes distally glabrous. Lateral branches lacking. Leaf-sheaths striately veined; glabrous on surface, or pilose. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs. Leaf-blade base broadly rounded. Leaf-blades linear, or lanceolate; 10-15 cm long; 5-6.5 mm wide. Leaf-blade surface pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; oblong; 4.5-6 cm long. Primary panicle branches 4-5 cm long. Panicle axis glabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 1-2 mm long; glabrous; tip widened.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 2.5 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 2.5 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes similar; reaching apex of florets; thinner than fertile lemma; recurved at apex and gaping. Lower glume ovate; clasping; 1.2-1.5 mm long; 0.5 length of spikelet; membranous; without keels; 5 -veined. Lower glume apex acuminate. Upper glume ovate; 1 length of spikelet; membranous; without keels; 5-7 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; lanceolate; 1 length of spikelet; membranous; 1-keeled; 7 -veined; acute; mucronate. Fertile lemma elliptic; dorsally compressed; 1.6-1.7 mm long; indurate; pallid; shiny; without keel. Lemma margins involute. Lemma apex obtuse. 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

  • 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