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 simulans

HABIT Annual. Culms 60–120 cm long; without nodal roots, or rooting from lower nodes. Culm-nodes pubescent. Leaf-sheaths longer than adjacent culm internode; glabrous on surface, or hirsute; with tubercle-based hairs. Ligule a ciliate membrane; 1.4 mm long. Leaf-blade base simple, or cordate. Leaf-blades linear, or lanceolate; 1–25 cm long; 2–15 mm wide. Leaf-blade surface papillose; rough adaxially. Leaf-blade margins smooth to scabrous. Leaf-blade apex acute, or acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; obovate; 8–40 cm long. Primary panicle branches ascending, or spreading; 1 -nate.

Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; dorsally compressed; acute, or acuminate; 2.6–3 mm long; falling entire. Rhachilla internodes elongated between glumes.

GLUMES Glumes similar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; clasping; 0.33–0.5 length of spikelet; membranous; without keels; 1(–3) -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins absent, or prominent. Lower glume apex acute, or acuminate. Upper glume ovate; 2.4–3 mm long; 1 length of spikelet; membranous; pallid, or purple; without keels; 7–9(–11) -veined. Upper glume hairs 2 mm long, or 3 mm long. Upper glume apex acute, or acuminate; mucronate.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 2.2–2.3 mm long; membranous; much thinner on margins; pallid, or purple; (7–)9 -veined; without cross-veins, or with cross-veins; scaberulous; rough on midvein; truncate, or acute. Palea of lower sterile floret 1 length of lemma. Fertile lemma oblong; dorsally compressed; 2–2.5 mm long; indurate; pallid; shiny; without keel. Lemma margins involute. Palea involute; indurate.

FLOWER Anthers 3; 1.4–1.7 mm long.

DISTRIBUTION Africa: south.

NOTES Paniceae. Smook 2003.

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