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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.
Echinopogon caespitosus
HABIT Perennial; caespitose; clumped moderately, or densely. Culms erect, or geniculately ascending; 50–100 cm long; 2–4 -noded. Culm-internodes smooth, or retrorsely scabrous. Lateral branches lacking. Leaf-sheaths smooth, or retrorsely scabrous; glabrous on surface. Ligule an eciliate membrane; 2 mm long; truncate. Leaf-blades erect; 12–25 cm long; 1.5–5 mm wide; stiff. Leaf-blade surface smooth, or scaberulous; glabrous, or pubescent. Leaf-blade apex acuminate; hardened.
INFLORESCENCE Inflorescence a panicle. Peduncle straight, or nodding; retrorsely scabrous above.
Panicle spiciform; lanceolate, or oblong; continuous, or interrupted; 1–10 cm long; 0.8–2 cm wide.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 3–5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent. Floret callus hairs 1 mm long.
GLUMES Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate; 3–5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous; eciliate, or ciliolate. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3–5 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous; eciliate, or ciliolate. Upper glume lateral veins absent. Upper glume apex acute.
FLORETS Fertile lemma lanceolate, or oblong; 3–5 mm long; cartilaginous; keeled; 5–7 -veined. Lemma apex entire, or dentate; 2 -fid; obtuse, or acute; awned; 1 -awned, or 3 -awned (rarely). Principal lemma awn apical, or from a sinus; 10–14 mm long overall. Lateral lemma awns arising on apex of lobes; 0–1.5 mm long; shorter than principal. Palea 1 length of lemma; 2 -veined. Palea keels scabrous; eciliate, or ciliolate; adorned above.
FLOWER Anthers 3; 1–2 mm long. Ovary glabrous, or pubescent on apex.
FRUIT Caryopsis with adherent pericarp; glabrous, or hairy at apex. Hilum linear.
DISTRIBUTION Australasia: Australia.
NOTES Aveneae. CEH.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
