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Descriptions

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

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

Saccharum fallax

HABIT Perennial; caespitose. Culms erect; 100–150 cm long. Leaf-sheaths outer margin hairy. Ligule an eciliate membrane. Leaf-blades 40–80 cm long; 10–15 mm wide; stiff. Leaf-blade surface glabrous, or hirsute; sparsely hairy. Leaf-blade margins scabrous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle with branches tipped by a raceme. Peduncle pubescent above.

Panicle open; oblong; dense; 30–40 cm long. Primary panicle branches appressed.

Racemes 8–10 cm long. Rhachis fragile at the nodes; subterete; pilose on surface. Rhachis hairs tawny. Rhachis internodes linear.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; subequal. Pedicels linear; ciliate; with tawny hairs.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear, or oblong; dorsally compressed; 4–5 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus bearded; base truncate. Spikelet callus hairs tawny; 2 mm long; 0.5 length of spikelet.

GLUMES Glumes dissimilar; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; chartaceous; much thinner above; 2-keeled; 2 -veined. Lower glume surface flat; pubescent; hairy generally. Lower glume margins ciliate. Lower glume hairs tawny. Lower glume apex truncate. Upper glume lanceolate; 1 length of spikelet; chartaceous; much thinner above; 1-keeled; 3 -veined. Upper glume apex truncate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 2.5 mm long; hyaline; ciliolate on margins; acute. Fertile lemma linear, or oblong; 2 mm long; hyaline. Lemma apex dentate; 2 -fid; muticous, or awned; 1 -awned. Principal lemma awn from a sinus; 3–7 mm long overall. Palea absent or minute.

FLOWER Lodicules 2; cuneate; ciliate. Anthers 3; 2 mm long.

DISTRIBUTION Asia-temperate: China. Asia-tropical: India, Indo-China, and Malesia.

NOTES Andropogoneae. Fl Assam 1993.

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