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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 peladoense
HABIT Perennial; caespitose. Culms erect; 20–60 cm long. Culm-internodes 3.5–10.5 cm long; distally glabrous, or pubescent. Culm-nodes purple; pubescent. Lateral branches lacking. Leaf-sheaths 3.5–8 cm long; glabrous on surface, or pilose; with tubercle-based hairs; outer margin hairy. Ligule a ciliate membrane; 0.5–1.7 mm long. Collar pilose. Leaf-blades linear, or lanceolate; 7–22 cm long; 2–4 mm wide. Leaf-blade surface pilose; densely hairy; hairy adaxially, or on both sides; with tubercle-based hairs. Leaf-blade margins cartilaginous; scaberulous; tuberculate-ciliate.
INFLORESCENCE Inflorescence a panicle. Peduncle 23–27 cm long.
Panicle open; ovate; 7–18 cm long; 3–13 cm wide. Panicle axis scabrous; with scattered hairs, or glabrous. Panicle branches scabrous; glabrous, or pilose; glabrous in axils.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels clavate; 2–10 mm long; scabrous.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acuminate; 2.7–3.3 mm long; 1–1.2 mm wide; falling entire; readily shedding glumes (upper glume).
GLUMES Glumes reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 1.7–2.1 mm long; 0.5–0.75 length of spikelet; membranous; without keels; 5–7 -veined. Lower glume primary vein scaberulous. Lower glume apex acute. Upper glume ovate; 1 length of spikelet; membranous; without keels; 7–9 -veined. Upper glume apex acute.
FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 7–9 -veined; acute. Palea of lower sterile floret 1 length of lemma. Fertile lemma elliptic; dorsally compressed; 1.9–2 mm long; indurate; black; shiny; without keel. Lemma margins involute. Palea involute; indurate.
FRUIT Caryopsis with adherent pericarp; 1.2–1.3 mm long. Embryo 0.33 length of caryopsis. Hilum punctiform.
DISTRIBUTION South America: western South America, Brazil, and southern South America.
NOTES Paniceae. Fl Paraguay 1995.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
