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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 filifolium

HABIT Perennial; caespitose. Butt sheaths coriaceous; persistent and investing base of culm; with compacted dead sheaths. Culms erect; robust; 100–200 cm long; woody. Culm-nodes bearded. Ligule an eciliate membrane. Leaf-blades flexuous; terete; 25–50 cm long; 1–3 mm wide; stiff. Leaf-blade apex attenuate; filiform.

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

Panicle open; lanceolate; 13–20 cm long; 3 cm wide. Primary panicle branches simple.

Racemes 4–8 cm long. Rhachis fragile at the nodes; subterete; pilose on surface. Rhachis hairs 4–6 mm long. Rhachis internodes linear.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; subequal. Pedicels linear; ciliate; with 4–6 mm long hairs.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5–8 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus bearded; base truncate. Spikelet callus hairs white; 4–8 mm long; 0.9–1 length of spikelet.

GLUMES Glumes similar; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; membranous; much thinner above; 2-keeled. Lower glume surface flat. Lower glume margins ciliate. Lower glume apex acuminate. Upper glume lanceolate; 1 length of spikelet; membranous; much thinner above; without keels. Upper glume margins ciliate. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; hyaline; ciliate on margins; acute. Fertile lemma lanceolate; hyaline. Lemma apex dentate, or lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; 10–30 mm long overall. Palea absent or minute.

FLOWER Lodicules 2; cuneate; ciliate. Anthers 3.

DISTRIBUTION Asia-temperate: western Asia. Asia-tropical: India.

NOTES Andropogoneae. Fl Pak 1993.

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