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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.
Danthonia chilensis
HABIT Perennial; caespitose. Culms geniculately ascending, or decumbent; 5–40 cm long; 2–3 -noded. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs; 0.2 mm long. Leaf-blades flat, or convolute; 5–12 cm long; 1 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy adaxially. Leaf-blade margins ciliate.
INFLORESCENCE Inflorescence a panicle; comprising 2–6 fertile spikelets.
Panicle open; oblong; 2.5–3.5 cm long; bearing few spikelets. Panicle branches scabrous.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.
FERTILE SPIKELETS Spikelets comprising 3–5 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 10–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.75–1.1 mm long; pilose. Floret callus hairs 0.5–1.2 mm long.
GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume linear; 10–12 mm long; 1 length of upper glume; membranous; without keels; 3 -veined. Lower glume apex acuminate. Upper glume linear; 10–12 mm long; 2.5 length of adjacent fertile lemma; membranous; without keels; 5–7 -veined. Upper glume apex acuminate.
FLORETS Fertile lemma elliptic; 4.5 mm long; coriaceous; much thinner on margins; without keel; 5 -veined. Lemma margins ciliate. Lemma apex lobed; 2 -fid; incised 0.25 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; 9.5–10 mm long overall; with twisted column. Column of lemma awn 2.5–3 mm long. Lateral lemma awns arising on apex of lobes; 3–4 mm long; shorter than principal. Palea 2 -veined. Palea keels 1 mm apart; ciliolate. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; cuneate; fleshy; glabrous. Anthers 3; 2 mm long.
FRUIT Caryopsis with adherent pericarp; 1.5–2 mm long. Embryo 0.4 length of caryopsis. Hilum linear.
CLEISTOGENES AND VIVIPARY Cleistogenes present; in lower sheaths.
DISTRIBUTION South America: southern South America.
NOTES Arundineae. Fl Pat 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
