Poaceae
Setaria

Setaria jaffrei Morat

First published in Adansonia, n.s., 18: 258 (1978)
This species is accepted
The native range of this species is New Caledonia. 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: confident
[AERP]

Morphology General Habit
Perennial; caespitose. Culms erect; robust; 100-130 cm long; 2-3 mm diam.; 14-16 -noded. Culm-nodes glabrous, or pubescent. Lateral branches lacking. Leaf-sheaths longer than adjacent culm internode; glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule a ciliate membrane; 2.8 mm long. Leaf-blades lanceolate; flat, or involute; 9-15 cm long; 10-12 mm wide; coriaceous; stiff.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; linear; interrupted; 30-40 cm long; 0.5-0.7 cm wide; contracted about primary branches. Primary panicle branches appressed, or ascending; distant; 2-2.3 cm long; bearing spikelets almost to the base; sterile at the tips. Spikelets subtended by an involucre. Fertile spikelets sessile; 1 in the cluster. Involucre composed of bristles; 0.3-2 mm long. Involucral bristles persistent; 1 per spikelet; flexible; antrorsely scaberulous; glabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute; 3-4 mm long; 1.5 mm wide; falling entire. Floret callus pubescent.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute; 3-4 mm long; 1.5 mm wide; falling entire. Floret callus pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; clasping; 2.2 mm long; 0.66 length of spikelet; membranous; without keels; 7 -veined. Lower glume apex acute. Upper glume ovate; 2.8 mm long; 0.75 length of spikelet; membranous; without keels; 7 -veined. Upper glume inner surface pubescent (above). Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; with palea. Lemma of lower sterile floret ovate; 1 length of spikelet; membranous; 5 -veined; acute. Palea of lower sterile floret 1-1.5 mm long; 0.33 length of lemma. Fertile lemma ovate; dorsally compressed; 3-4 mm long; indurate; without keel. Lemma surface striate; unwrinkled. Lemma margins involute. Palea involute; indurate. Palea keels ciliolate; adorned above.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3.
Distribution
Pacific: southwestern.
Reference
Paniceae. Morat 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 2026. 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 2026. 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