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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 australe
HABIT Perennial; caespitose. Rhizomes short. Culms 30–60 cm long. Ligule an eciliate membrane; 1.5–4 mm long; obtuse, or acute. Leaf-blades 2–7 mm wide; aromatic. Leaf-blade surface glabrous, or pilose; sparsely hairy; hairy adaxially. Leaf-blade margins scabrous.
INFLORESCENCE Inflorescence a panicle; comprising 20–35 fertile spikelets.
Panicle open; pyramidal; 3.5–7 cm long. Primary panicle branches 1–2 -nate. Panicle axis 6–8 noded.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels puberulous; hairy at tip; with 0.1–0.3 mm long hairs.
FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 3.5–5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.15–0.3 mm long.
GLUMES Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; shiny. Lower glume ovate; 3.5–5.5 mm long; 1 length of upper glume; membranous; 1-keeled. Lower glume apex acute. Upper glume ovate; 3.5–5.5 mm long; 1.1–1.4 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume apex acute.
FLORETS Basal sterile florets dissimilar; male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret elliptic; 3–4.5 mm long; 1 length of fertile lemma; chartaceous; 1-keeled; 3–5 -veined; ciliate on margins; dentate; 2 -fid; mucronate, or awned. Awn of lower sterile floret 0.1–0.5 mm long. Palea of lower sterile floret 1 mm long. Lemma of upper sterile floret oblong; 3–4.5 mm long; chartaceous; ciliate on margins; dentate; 2 -fid; awned. Awn of upper sterile floret dorsal; arising 0.5 way up back of lemma; geniculate; 1–3 mm long. Fertile florets female. Fertile lemma ovate; 3–4 mm long; cartilaginous; without keel. Lemma surface puberulous; hairy above. Lemma margins convolute; covering most of palea. Lemma apex acute. Palea 1 -veined; without keels.
FLOWER Anthers 2 (bisexual), or 3 (male); 1.3–2.6 mm long. Stigmas pubescent. Ovary glabrous.
FRUIT Caryopsis with adherent pericarp.
DISTRIBUTION Europe: central, southeastern, and eastern.
NOTES Aveneae. Weimarck 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
