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Descriptions

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

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

Imperata conferta

HABIT Perennial. Rhizomes elongated. Culms erect; 100–200 cm long. Culm-nodes glabrous, or pubescent. Leaves mostly basal. Ligule a ciliate membrane. Leaf-blades erect; 20–45 cm long; 7–14 mm wide; stiff. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle with branches tipped by a raceme.

Panicle contracted; lanceolate; 25–50 cm long; 2–5 cm wide. Primary panicle branches closely spaced; 6–12 cm long. Panicle branches capillary.

Racemes 0.5–1 cm long; bearing few fertile spikelets. Rhachis tough. Rhachis internodes filiform.

Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels filiform; unequal; 1.2–2.6 mm long.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 3 mm long; falling entire. Spikelet callus bearded; base truncate. Spikelet callus hairs white; 15–22 mm long; 5–7 length of spikelet.

GLUMES Glumes similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; membranous; without keels; 3 -veined. Lower glume surface villous; hairy below. Lower glume apex acuminate. Upper glume lanceolate; 2.8 mm long; 0.9 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface villous; hairy below. Upper glume apex acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to fertile lemma; linear; 2 mm long; 0.66 length of spikelet; hyaline; 1 -veined; without lateral veins; acuminate. Fertile lemma linear; 2 mm long; hyaline; without keel; 1 -veined. Lemma apex erose; obtuse. Palea 0.5 length of lemma; hyaline; 0 -veined; without keels.

FLOWER Lodicules absent. Anthers 1; 2 mm long. Stigmas 2; terminally exserted.

DISTRIBUTION Asia-temperate: eastern Asia. Asia-tropical: Indo-China, Malesia, and Papuasia. Pacific: southwestern and northwestern.

NOTES Andropogoneae. Gilliland.

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