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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.
Panicum nomnov1(Whalleya pungens)
HABIT Perennial; caespitose. Cataphylls evident. Stolons present. Culms erect; 10–45 cm long; 4–8 -noded. Culm-internodes hollow; distally glabrous. Culm-nodes glabrous. Lateral branches sparse, or ample. Leaf-sheaths longer than adjacent culm internode; without keel; smooth; glabrous on surface; outer margin glabrous. Ligule an eciliate membrane; 0.7–1.9 mm long; truncate, or obtuse. Collar glabrous. Leaf-blades involute; 2–15 cm long; 1.9–3 mm wide. Leaf-blade surface scaberulous; glabrous. Leaf-blade margins scaberulous. Leaf-blade apex acuminate; pungent.
INFLORESCENCE Inflorescence a panicle.
Panicle open; ovate; effuse; 3–30 cm long. Primary panicle branches spreading; branching divaricately; 1.5–17.5 cm long.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels 7–100 mm long; scabrous; tip cupuliform.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; compressed slightly; acute; 3–3.7 mm long; 1.1–1.8 mm wide; falling entire. Rhachilla internodes elongated between glumes.
GLUMES Glumes reaching apex of florets; thinner than fertile lemma. Lower glume ovate; clasping; 2.2–3 mm long; 0.6–0.9 length of spikelet; membranous; without keels; 3–5(–7) -veined. Lower glume lateral veins prominent. Lower glume surface scabrous. Lower glume apex acute. Upper glume elliptic; 2.9–3.5 mm long; 1 length of spikelet; membranous; without keels; 7–9 -veined. Upper glume lateral veins prominent. Upper glume surface scabrous. Upper glume apex acute.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; elliptic; 2.8–3.3 mm long; 1 length of spikelet; membranous; 7–9 -veined; prominently veined; acute, or acuminate. Fertile lemma elliptic; dorsally compressed; 2.5–2.9 mm long; indurate; without keel. Lemma surface granulose; with distinct germination flap. Lemma margins involute. Lemma apex acute. Palea involute; indurate.
FLOWER Anthers 3; 1.5–1.8 mm long.
FRUIT Caryopsis with adherent pericarp.
DISTRIBUTION Australasia: Australia.
NOTES Paniceae. Wills & Bruhl 2001.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
