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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 narenga

HABIT Perennial. Culms erect; robust; 150–350 cm long. Culm-internodes solid. Culm-nodes bearded. Leaf-sheaths hirsute. Ligule an eciliate membrane. Leaf-blade base tapering to the midrib. Leaf-blades flat, or conduplicate; 50–100 cm long; 4–30 mm wide. Leaf-blade surface pilose; with tubercle-based hairs. Leaf-blade apex attenuate.

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

Panicle open; linear; dense; 20–55 cm long. Primary panicle branches 5–10 cm long.

Racemes 1–2.5 cm long. Rhachis fragile at the nodes; subterete. Rhachis internodes filiform.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; subequal. Pedicels filiform; villous; with 3–6 mm long hairs.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; obtuse; 2–3 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus bearded; base truncate. Spikelet callus hairs white; 0.5 length of spikelet.

GLUMES Glumes reaching apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; coriaceous; dark brown, or red; without keels. Lower glume surface pilose. Lower glume apex obtuse. Upper glume oblong; 1 length of spikelet; coriaceous; dark brown, or red; without keels. Upper glume surface pilose. Upper glume apex obtuse.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; 1 length of spikelet; hyaline; 0 -veined; without midvein; without lateral veins; ciliate on margins; obtuse. Fertile lemma oblong; 2–3 mm long; hyaline. Lemma margins ciliolate; hairy above. Lemma apex entire; muticous. Palea hyaline.

FLOWER Anthers 3.

DISTRIBUTION Africa: northeast tropical. Asia-temperate: China and eastern Asia. Asia-tropical: India and Indo-China.

NOTES Andropogoneae. Fl Pak.

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