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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Setaria hunzikeri

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.

INFLORESCENCE 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.

FERTILE 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.

GLUMES 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.

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.

FLOWER Lodicules 2; 0.25 mm long. Anthers 3; 0.33 mm long.

FRUIT 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.

NOTES Paniceae. Anton 1997.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.