GrassBase - The Online World Grass Flora


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

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

Spodiopogon duclouxii

HABIT Perennial. Rhizomes elongated. Culms erect; 120–140 cm long; 8 -noded. Culm-internodes distally glabrous. Lateral branches lacking. Leaf-sheaths striately veined; glabrous on surface. Ligule an eciliate membrane; 1.5 mm long; truncate. Leaf-blade base with a false petiole; petiole 0.5–1.5 cm long. Leaf-blades linear to lanceolate; 15–25 cm long; 12–18 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface scaberulous; rough adaxially; pilose; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle with branches tipped by a raceme.

Panicle open; ovate; 10–12 cm long. Primary panicle branches ascending; whorled at most nodes; simple; 1.5–5 cm long. Panicle branches capillary; apically expanded.

Racemes 1–1.2 cm long; bearing few fertile spikelets; bearing 4–8 fertile spikelets on each. Rhachis fragile at the nodes; subterete; ciliate on margins.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels ciliate; tip cupuliform.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acute; 5 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus pilose; base obtuse; inserted. Spikelet callus hairs 0.15–0.2 length of spikelet.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; chartaceous; pallid; without keels; 6 -veined. Lower glume lateral veins ribbed. Lower glume surface pubescent. Lower glume apex acuminate. Upper glume lanceolate; chartaceous; pallid; without keels; 5 -veined. Upper glume lateral veins ribbed. Upper glume surface pubescent. Upper glume margins ciliate. Upper glume apex dentate; 2 -fid.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret ovate; 4 mm long; hyaline; dentate; 2 -fid; awned. Awn of lower sterile floret 1 mm long. Fertile lemma lanceolate; 4 mm long; hyaline. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 7–8 mm long overall; with twisted column. Palea hyaline; without keels.

FLOWER Lodicules 2. Anthers 3.

DISTRIBUTION Asia-temperate: China.

NOTES Andropogoneae. Camus 1996.

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