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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Anthoxanthum fraseri

HABIT Perennial; caespitose. Rhizomes short. Culms erect; 30–60 cm long. Leaf-sheaths loose; longer than adjacent culm internode; ribbed. Ligule an eciliate membrane; 2–5 mm long; erose; obtuse, or acute. Leaf-blades 10–20 cm long; 4.5–8 mm wide; stiff; aromatic. Leaf-blade surface scaberulous; rough on both sides. Leaf-blade apex attenuate; hardened.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; lanceolate; 4–9 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma; shiny; gaping. Lower glume ovate; 2.5–4 mm long; 1 length of upper glume; hyaline; without keels; 1 -veined. Lower glume lateral veins absent. Upper glume ovate; 3.5–4 mm long; 0.8–1.3 length of adjacent fertile lemma; hyaline; without keels; 3 -veined.

FLORETS Basal sterile florets similar; male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret elliptic; 3.5–4.5 mm long; 1.1–1.5 length of fertile lemma; 1 length of spikelet; chartaceous; much thinner above; light brown; 1-keeled; 5 -veined; scaberulous; ciliolate on margins; mucronate, or awned. Awn of lower sterile floret subapical; 1–2 mm long. Lemma of upper sterile floret elliptic; 3.5–4.5 mm long; 1 length of lower sterile floret; chartaceous; scabrous; ciliolate on margins; awned. Awn of upper sterile floret subapical; 1–2 mm long. Fertile lemma ovate; 3 mm long; cartilaginous; shiny; without keel; 5 -veined. Lemma surface pubescent; hairy above. Lemma margins convolute; covering most of palea. Lemma apex mucronate. Palea elliptic; 1 length of lemma; 1 -veined; 1-keeled.

FLOWER Lodicules 2. Anthers 2 (bisexual), or 3 (male); 1.5–2 mm long.

FRUIT Caryopsis with adherent pericarp; obovoid; 1.5 mm long.

DISTRIBUTION Australasia: Australia.

NOTES Aveneae. Morris 2000.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.