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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Spodiopogon lacei
HABIT Perennial; caespitose. Culms erect; 200–300 cm long. Ligule an eciliate membrane. Leaf-blade base sagittate; with a false petiole. Leaf-blades 20–30 cm long; 8–20 mm wide. Leaf-blade surface glabrous, or hirsute; with tubercle-based hairs. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence a panicle with branches tipped by a raceme.
Panicle open; lanceolate, or ovate; 10–20 cm long. Primary panicle branches whorled at most nodes; simple; 0.5–3 cm long.
Racemes 0.5–2 cm long; bearing few fertile spikelets; bearing 3–11 fertile spikelets on each. Rhachis fragile at the nodes; flattened; ciliate on margins. Rhachis hairs dark brown. Rhachis internodes clavate; 3–3.5 mm long.
Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels clavate; flattened; 3–3.5 mm long; ciliate; tip cupuliform.
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. Spikelet callus hairs dark brown; 0.5–1 mm long.
GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; chartaceous; pallid; without keels; 7–9 -veined. Lower glume lateral veins ribbed. Lower glume surface villous. Lower glume hairs dark brown. Lower glume apex emarginate, or obtuse. Upper glume lanceolate; chartaceous; pallid; 1-keeled; 3–5 -veined. Upper glume lateral veins ribbed. Upper glume surface glabrous, or pilose. Upper glume hairs dark brown. Upper glume apex emarginate, or obtuse.
FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret lanceolate; 1 length of spikelet; hyaline; 0–3 -veined; pubescent; hairy above; eciliate on margins, or ciliate on margins; emarginate, or obtuse. Fertile lemma oblong; 4 mm long; hyaline; 3 -veined. Lemma apex lobed; 2 -fid; incised 0.66 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 7–12 mm long overall; with twisted column. Palea lanceolate; hyaline; 0 -veined; without keels.
FLOWER Lodicules 2; cuneate. Anthers 3.
DISTRIBUTION Asia-tropical: India and Indo-China.
NOTES Andropogoneae. WDC.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
