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Descriptions

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

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

Amphipogon laguroides

HABIT Perennial; caespitose. Rhizomes absent, or short. Butt sheaths glabrous, or sparsely hairy. Culms erect; 25–30 cm long; 4–5 -noded. Ligule a fringe of hairs; 0.5–2 mm long. Leaf-blades flexuous; convolute; 10–20 cm long; 2–3 mm wide; stiff. Leaf-blade surface ribbed; scaberulous; rough abaxially; pubescent; hairy adaxially. Leaf-blade apex pungent.

INFLORESCENCE Inflorescence a panicle.

Panicle capitate; ovate, or globose; 1–1.5 cm long. Primary panicle branches accrescent to a central axis; with evident branchlets on axis.

Spikelets solitary. Fertile spikelets sessile.

STERILE SPIKELETS Basal sterile spikelets rudimentary.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 5–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief; pubescent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 5–6 mm long; 1 length of upper glume; membranous; without keels; 3 -veined. Lower glume surface pilose; with tubercle-based hairs. Lower glume apex setaceously attenuate. Upper glume lanceolate; 5–6 mm long; 1.2 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume surface pilose; with tubercle-based hairs. Upper glume apex setaceously attenuate.

FLORETS Fertile lemma oblong; 4–5 mm long; coriaceous; without keel; 7 -veined. Lemma surface pubescent; hairy below; hairy between veins. Lemma margins involute. Lemma apex lobed; 3 -fid; incised 0.5 of lemma length; awned; 3 -awned. Principal lemma awn 5–6 mm long overall. Lateral lemma awns arising on apex of lobes; 5–6 mm long; shorter than principal. Palea oblong; 2 -veined; without keels. Palea surface pubescent; hairy on flanks. Palea apex lobed; 2 -fid; acuminate; awned.

FLOWER Anthers 3.

FRUIT Caryopsis with free soft pericarp.

DISTRIBUTION Australasia: Australia.

NOTES Arundineae. Vickery.

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