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Descriptions

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

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

Miscanthus lutarioriparius

HABIT Perennial. Rhizomes short; scaly. Culms geniculately ascending; robust; 300–700 cm long; 10–20 mm diam.; without nodal roots, or with prop roots. Culm-internodes with small lumen, or solid. Culm-nodes pubescent. Lateral branches ample. Leaves cauline. Leaf-sheaths glabrous on surface. Leaf-sheath auricles absent, or erect. Ligule a ciliolate membrane; 0.5 mm long. Leaf-blade base tapering to the midrib, or simple. Leaf-blades 50–90 cm long; 15–30 mm wide. Leaf-blade midrib prominent beneath. Leaf-blade surface glabrous; hairless except near base. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes few, or numerous; 20–40; digitate, or borne along a central axis; 10–30 cm long. Central inflorescence axis 10–25 cm long; glabrous. Rhachis tough; subterete.

Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels filiform; unequal; 1.5–5.5 mm long.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 4–6.5 mm long; falling entire. Spikelet callus bearded; base truncate. Spikelet callus hairs white; 10 length of spikelet.

GLUMES Glumes similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; chartaceous; without keels; 3–5 -veined. Lower glume surface flat; hirsute. Lower glume hairs 10 mm long. Lower glume apex entire; attenuate. Upper glume lanceolate; chartaceous; without keels; 3 -veined. Upper glume margins pubescent. Upper glume apex attenuate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 3.5–4.5 mm long; hyaline; 0 -veined; without lateral veins; pilose; acute. Fertile lemma lanceolate; 3–4 mm long; hyaline; without keel; 0 -veined. Lemma surface pilose.

FLOWER Anthers 3; 2 mm long.

FRUIT Caryopsis lanceolate; 2 mm long.

DISTRIBUTION Asia-temperate: China.

NOTES Andropogoneae. Fl China 2007.

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