GrassBase - The Online World Grass Flora


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

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

Panicum seminudum

HABIT Annual. Culms erect; 40–90 cm long; 2–5 -noded. Culm-nodes glabrous. Leaf-sheaths glabrous on surface, or pubescent; outer margin glabrous, or hairy. Ligule a ciliate membrane; 0.8–1.5 mm long. Leaf-blades 4–30 cm long; 3–9 mm wide. Leaf-blade surface smooth, or scabrous; glabrous, or pilose. Leaf-blade margins scabrous; glabrous, or ciliate; hairy at base.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 15–30 cm long; evenly furnished, or with spikelets clustered towards branch tips. Primary panicle branches spreading; 10–25 cm long; bearing 20–60 fertile spikelets on each lower branch. Panicle axis scabrous. Panicle branches scabrous; glabrous in axils.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1–7 mm long; scabrous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or elliptic; dorsally compressed; 3.1–3.7 mm long; 1–1.8 mm wide; falling entire. Rhachilla internodes elongated between glumes. Rhachilla elongation 0.4–0.5 mm long.

GLUMES Glumes reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate, or ovate; 2.3–3.3 mm long; 0.75–0.95 length of spikelet; membranous; without keels; 3–5 -veined. Lower glume lateral veins thickened. Lower glume apex acute, or acuminate. Upper glume lanceolate, or ovate; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume apex obtuse, or acute, or acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; lanceolate, or ovate; 1 length of spikelet; membranous; 5 -veined; acute, or acuminate. Fertile lemma elliptic; dorsally compressed; 1.9–2.2 mm long; indurate; without keel. Lemma lateral veins distinct. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate.

FLOWER Anthers 3; 1.2–1.4 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Papuasia. Australasia: Australia.

NOTES Paniceae. Webster 1993.

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