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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 ovuliferum
HABIT Perennial. Culms decumbent; 40–120 cm long; 1–2 mm diam.; rooting from lower nodes. Culm-internodes distally glabrous. Culm-nodes glabrous, or pubescent. Lateral branches ample. Leaf-sheaths glabrous on surface, or pilose; with tubercle-based hairs; outer margin hairy. Ligule an eciliate membrane; 0.2–0.4 mm long; erose. Leaf-blade base cordate; asymmetrical; with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 5.5–12 cm long; 8–12 mm wide. Leaf-blade surface glabrous, or pilose; sparsely hairy; with tubercle-based hairs.
INFLORESCENCE Inflorescence a panicle; terminal and axillary. Axillary inflorescences different from terminal (spikelets cleistogamous, pubescent).
Panicle open; pyramidal; 13–30 cm long; 13–26 cm wide. Primary panicle branches 1–2 -nate. Panicle branches bearded in axils.
Spikelets appressed; solitary, or in pairs. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; obtuse; 3.1–3.6 mm long; falling entire.
GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 2.2–2.6 mm long; 0.75 length of spikelet; membranous; without keels; 3 -veined. Lower glume lateral veins prominent. Lower glume apex obtuse. Upper glume ovate; 2.9–3.2 mm long; 1 length of spikelet; membranous; without keels; 5–7 -veined. Upper glume lateral veins prominent. Upper glume apex obtuse.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; elliptic; 2.4–3.1 mm long; 1 length of spikelet; membranous; 7 -veined; prominently veined; acute. Fertile lemma obovate; dorsally compressed; 2.4–3.1 mm long; indurate; shiny; without keel. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate.
FLOWER Anthers 3; 1.1–1.7 mm long; orange.
DISTRIBUTION South America: northern South America, western South America, Brazil, and southern South America.
NOTES Paniceae. Fl Costa Rica 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
