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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.
Altoparadisium chapadense
HABIT Perennial; caespitose; clumped moderately. Rhizomes short; knotty; scaly. Culms 75–80 cm long; 6–9 -noded. Culm-internodes hollow; distally glabrous. Culm-nodes flush with internodes; purple; glabrous. Lateral branches lacking, or sparse; arising from mid culm. Leaves cauline. Leaf-sheaths without keel; striately veined; glabrous on surface; outer margin glabrous, or hairy. Ligule a fringe of hairs; 0.3–0.5 mm long. Leaf-blades linear, or lanceolate; 6–10 cm long; 3–8 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous. Leaf-blade margins scabrous. Leaf-blade apex attenuate; muticous, or pungent.
INFLORESCENCE Inflorescence a panicle; exserted, or embraced at base by subtending leaf. Peduncle 2–4.5 cm long.
Panicle contracted; lanceolate, or oblong; 6.5–14.5 cm long; 1.5–3.5 cm wide. Primary panicle branches 2–8 -nate; whorled at most nodes. Panicle axis glabrous. Panicle branches glabrous; bearded in axils (1–3mm).
Spikelets solitary, or in pairs. Fertile spikelets pedicelled. Pedicels filiform; unequal; 1–3 mm long; ciliate; hairy at tip and at base; with 1–4 mm long hairs; tip discoid.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; dorsally compressed; 3–3.2 mm long; falling entire. Spikelet callus pilose. Spikelet callus hairs 1–1.5 mm long.
GLUMES Glumes one the lower absent or obscure; reaching apex of florets; firmer than fertile lemma. Upper glume oblong; 1 length of spikelet; membranous; without keels; 3–5 -veined. Upper glume surface hispid; hairy on veins. Upper glume awned; 1 -awned. Upper glume awn 18–26 mm long.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; oblong; 1 length of spikelet; membranous; much thinner on margins; 3 -veined; with conspicuous midvein; ribbed; pubescent; acute. Fertile lemma absent. Palea absent or minute.
FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 1.8–2.1 mm long; purple. Stigmas 2. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp; lanceolate, or oblong; dorsally compressed; 1.8–1.9 mm long; light brown. Embryo 0.33 length of caryopsis. Hilum elliptic; 0.2 length of caryopsis.
DISTRIBUTION South America: Brazil.
NOTES Paniceae. Filgueiras 2002.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
