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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.
Anthoxanthum juncifolium
HABIT Perennial. Cataphylls evident. Culms 30–80 cm long. Leaf-sheaths longer than adjacent culm internode; smooth, or scaberulous. Ligule a ciliolate membrane; 1–4 mm long; obtuse. Leaf-blades filiform; convolute; 7–35 cm long; 1–2 mm wide; stiff. Leaf-blade surface puberulous; hairy adaxially. Leaf-blade apex pungent.
INFLORESCENCE Inflorescence a panicle. Peduncle antrorsely scabrous above.
Panicle spiciform; linear; continuous; 6–10 cm long. Panicle axis scaberulous.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous; pubescent; hairy at tip.
FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; 6–7 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes persistent; similar; shorter than spikelet, or reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 5.5–6.5 mm long; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume primary vein scabrous. Lower glume apex acute. Upper glume ovate; 5.5–6.5 mm long; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.
FLORETS Basal sterile florets similar; male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret elliptic; 5–6.5 mm long; 1 length of fertile lemma; chartaceous; 1-keeled; 5 -veined; ciliolate on margins; obtuse; mucronate. Lemma of upper sterile floret oblong; 1 length of lower sterile floret; chartaceous; ciliolate on margins; obtuse; awned. Awn of upper sterile floret dorsal; arising 0.75 way up back of lemma; geniculate; 1.5–4 mm long. Fertile florets female. Fertile lemma ovate; 4–4.5 mm long; cartilaginous; without keel; 5 -veined. Lemma surface scaberulous; rough above. Lemma margins convolute; covering most of palea. Lemma apex acute. Palea linear; 1 -veined; without keels.
FLOWER Anthers 3; 2.5–4 mm long. Staminodes two present. Stigmas pubescent. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp.
DISTRIBUTION South America: western South America and southern South America.
NOTES Aveneae. Fl Pat 1995.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
