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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 hebotes
HABIT Perennial. Culms decumbent; 30–90 cm long; rooting from lower nodes. Culm-internodes 3.5–15 cm long; distally hispid. Culm-nodes constricted; brown; pubescent. Leaf-sheaths 2.5–7.5 cm long; hispid; outer margin hairy. Ligule a ciliate membrane; 0.3 mm long. Collar pubescent. Leaf-blades lanceolate; 4.5–15 cm long; 7–23 mm wide. Leaf-blade surface hispid; hairy abaxially, or on both sides. Leaf-blade margins scabrous. Leaf-blade apex attenuate.
INFLORESCENCE Inflorescence a panicle. Peduncle 12–32 cm long; hirsute above.
Panicle open; ovate; 7–22 cm long; 4.5–11 cm wide. Panicle axis hispid. Panicle branches glandular; glabrous, or pubescent.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.5–1.9 mm long; 0.6–0.9 mm wide; falling entire.
GLUMES Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; not clasping; 0.7–1.5 mm long; 0.2 length of spikelet, or 0.75 length of spikelet (dimorphic); membranous; without keels; 3–7 -veined. Lower glume surface glabrous, or puberulous. Lower glume apex obtuse, or acute. Upper glume elliptic; 0.9 length of spikelet; membranous; without keels; 9 -veined. Upper glume surface asperulous; rough above; glabrous, or puberulous. Upper glume apex acute.
FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 9 -veined; scaberulous; rough above; glabrous, or puberulous; acute. Palea of lower sterile floret 0.7–1.2 mm long; 0.5–0.75 length of lemma. Fertile lemma elliptic; dorsally compressed; 1.3–1.7 mm long; 0.7–0.8 mm wide; indurate; pallid, or dark brown, or black; shiny; without keel. Lemma surface smooth. Lemma margins involute. Lemma apex acute; pubescent. Palea involute; indurate.
FLOWER Anthers 3; 0.7 mm long.
FRUIT Caryopsis with adherent pericarp; ellipsoid; 1 mm long; light brown. Embryo 0.5 length of caryopsis. Hilum punctiform.
DISTRIBUTION South America: northern South America, western South America, and Brazil.
NOTES Paniceae. Zuloaga 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
