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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
HABIT Perennial. Rhizomes absent (3), or short (6). Culms erect (7), or geniculately ascending (5), or decumbent (1); 10–31.25–60 cm long. Ligule a fringe of hairs. Leaf-blades filiform (4), or linear (4); stiff (4), or firm (4). Leaf-blade apex muticous (3), or pungent (5).
INFLORESCENCE Inflorescence a panicle.
Panicle spiciform (4), or capitate (5).
Spikelets solitary. Fertile spikelets sessile (2), or pedicelled (6). Pedicels linear (1/5), or oblong (4/5).
STERILE SPIKELETS Basal sterile spikelets absent (6), or rudimentary (4).
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 5–8.562–13 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief (6), or elongated (2); pubescent (7/7); obtuse (5), or acute (2), or pungent (1).
GLUMES Glumes persistent; shorter than spikelet (2), or reaching apex of florets (1), or exceeding apex of florets (5); thinner than fertile lemma. Lower glume lanceolate (4), or ovate (4); 0.75–1.015–1.3 length of upper glume; membranous (5), or chartaceous (2), or scarious (1); without keels; 3 -veined. Lower glume surface smooth (6), or scabrous (2); without pits; glabrous (5), or pilose (2), or hirsute (1), or villous (1). Lower glume apex entire (7), or dentate (1); 3 -fid (1/1); obtuse (1/7), or acute (2/7), or acuminate (2/7), or setaceously attenuate (2/7); muticous (7), or awned (1). Upper glume lanceolate (4), or ovate (4); 0.3–1.085–1.8 length of adjacent fertile lemma; membranous (5), or chartaceous (2), or scarious (1); with undifferentiated margins (6), or hyaline margins (1), or membranous margins (1); without keels; 3 -veined (7/7). Upper glume surface smooth (6), or scabrous (2); glabrous (5), or pilose (2), or hirsute (1), or villous (1); with simple hairs (3/4), or tubercle-based hairs (1/4). Upper glume apex entire (7), or dentate (1); 3 -fid (1/1); obtuse (1/7), or acute (2/7), or acuminate (2/7), or setaceously attenuate (2/7); muticous (7), or awned (1); 1 -awned (1/1).
FLORETS Fertile lemma lanceolate (1), or oblong (7); not gibbous (7), or gibbous (1); cartilaginous (1), or coriaceous (7); of similar consistency on margins (7), or much thinner on margins (1); without keel; wingless; 3 -veined (7), or 7 -veined (1). Lemma midvein eciliate (6), or pubescent (2). Lemma lateral veins obscure (1/1). Lemma surface smooth (7), or scabrous (1); unwrinkled; without grooves; glabrous (2), or pubescent (6), or pilose (1), or plumose (1); hairy on back (5/7), or on veins (1/7), or between veins (1/7). Lemma margins involute. Lemma apex lobed; 3 -fid; incised 0.3–0.5325–0.7 of lemma length; acute (1/3), or acuminate (1/3), or setaceously attenuate (1/3); muticous (2), or awned (6); 3 -awned (6/6). Principal lemma awn limb glabrous (5/6), or ciliate (2/6). Lateral lemma awns subequal to principal (5/6), or shorter than principal (1/6). Palea 0.9–0.9333–1 length of lemma; membranous (6), or cartilaginous (1), or coriaceous (1); 2 -veined (7/7); without keels (6), or 2-keeled (2). Palea keels smooth (1/2), or scaberulous (1/2). Palea surface glabrous (4), or pubescent (3), or pilose (1). Palea apex dentate (1/7), or lobed (6/7); muticous (2), or awned (6).
FLOWER Anthers 3.
FRUIT Caryopsis with free soft pericarp (7/7); obovoid (1/1).
DISTRIBUTION Australasia.
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Version: 29th January 2008.