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Descriptions

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

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

Spodiopogon yuexiensis

HABIT Perennial; caespitose. Culms erect; 100–200 cm long; 2–6 mm diam. Culm-internodes distally pruinose, or glabrous. Leaf-sheaths loose; glabrous on surface. Ligule a ciliolate membrane; scarious. Leaf-blades 8–30 cm long; 4–22 mm wide. Leaf-blade surface hispid; densely hairy; hairy adaxially; with tubercle-based hairs. Leaf-blade margins scabrous.

INFLORESCENCE Inflorescence a panicle with branches tipped by a raceme.

Panicle open; elliptic; 12–27 cm long; 4–9 cm wide. Primary panicle branches whorled at most nodes; 3–8 cm long. Panicle axis glabrous.

Racemes 1–1.5 cm long; bearing few fertile spikelets; bearing 3–5 fertile spikelets on each. Rhachis fragile at the nodes; subterete. Rhachis internodes 5–6 mm long.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels 5–6 mm long; glabrous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus pubescent; base obtuse; inserted.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; chartaceous; pallid; without keels; 11 -veined. Lower glume lateral veins ribbed. Lower glume surface pilose. Lower glume apex acute, or acuminate. Upper glume lanceolate; chartaceous; pallid; without keels; 9–11 -veined. Upper glume lateral veins ribbed. Upper glume surface pilose. Upper glume apex acute, or acuminate.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret lanceolate; hyaline; ciliolate on margins; acute. Fertile lemma 4 mm long; hyaline. Lemma apex lobed; 2 -fid; incised 0.5–0.66 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 8–12 mm long overall; with twisted column. Palea 0.8 length of lemma; hyaline; 0 -veined; without keels. Palea apex dentate; 2 -fid.

FLOWER Lodicules 2. Anthers 3; 3–3.5 mm long; yellow.

DISTRIBUTION Asia-temperate: China.

NOTES Andropogoneae. Zhong 2001.

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