Poaceae
Setaria

Setaria hunzikeri Anton

First published in Kurtziana 17: 139 (1984)
This species is accepted
The native range of this species is Paraguay to N. Argentina. It is a perennial and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Culms 70 cm long. Culm-internodes distally glabrous. Culm-nodes brown; glabrous. Lateral branches ample. Leaf-sheaths hispid; with tubercle-based hairs. Ligule a ciliate membrane; 0.8 mm long. Collar pubescent. Leaf-blades 12-13 cm long; 10 mm wide. Leaf-blade surface pubescent; hairy on both sides; with tubercle-based hairs. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle 9-12 cm long; pubescent above. Panicle spiciform; linear; 8 cm long; 1 cm wide. Primary panicle branches accrescent to a central axis; with evident branchlets on axis. Panicle axis scabrous; hispidulous. Spikelets subtended by an involucre. Fertile spikelets sessile; 1 in the cluster. Involucre composed of bristles; 6-8 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 orbicular; dorsally compressed; 2 mm long; falling entire; readily shedding fertile florets.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets orbicular; dorsally compressed; 2 mm long; falling entire; readily shedding fertile florets.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; clasping; 0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume apex obtuse, or acute. Upper glume ovate; 0.66 length of spikelet; membranous; without keels; 5 -veined. Upper glume apex cuspidate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret ovate; 1 length of spikelet; membranous; 5 -veined; cuspidate. Palea of lower sterile floret 0.9 length of lemma. Fertile lemma orbicular; dorsally compressed; gibbous; 2 mm long; indurate; without keel. Lemma surface rugulose. Lemma margins involute. Lemma apex apiculate. Palea involute; indurate.
Morphology Reproductive morphology Flowers
Lodicules 2; 0.25 mm long. Anthers 3; 0.33 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid; 1.3 mm long; pallid. Embryo 0.5 length of caryopsis. Hilum punctiform.
Distribution
South America: western South America and southern South America.
Reference
Paniceae. Anton 1997.
[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: low confidence
[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

  • 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