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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 caricinus

HABIT Perennial; caespitose. Butt sheaths pubescent. Culms erect; 20–50 cm long; 4 -noded. Ligule a fringe of hairs. Leaf-blades convolute; 10–15 cm long; 2–3 mm wide. Leaf-blade surface ribbed; scaberulous; rough on both sides.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; oblong; 2–4(–6) cm long. Primary panicle branches accrescent to a central axis; with evident branchlets on axis. Panicle axis glabrous, or pubescent.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong; 0.5–2 mm long.

STERILE SPIKELETS Basal sterile spikelets absent, or rudimentary.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 6–7 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 ovate; 4.5–6 mm long; 0.75–0.9 length of upper glume; chartaceous; without keels; 3 -veined. Lower glume surface scabrous. Lower glume apex acute. Upper glume ovate; 6–7 mm long; 1.2 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume surface scabrous. Upper glume apex acute.

FLORETS Fertile lemma oblong; gibbous; 5–6 mm long; coriaceous; much thinner on margins; without keel; 3 -veined. Lemma midvein pubescent; hairy below (in 2 lines). Lemma surface glabrous, or pubescent. Lemma margins involute. Lemma apex lobed; 3 -fid; with margins splitting into evanescent supplementary lobes; incised 0.5 of lemma length; awned; 3 -awned. Principal lemma awn 2.5–3 mm long overall; limb glabrous, or ciliate. Lateral lemma awns arising on apex of lobes; 2.5–3 mm long; subequal to principal; glabrous, or ciliolate. Palea oblong; 2 -veined; without keels. Palea apex lobed; 2 -fid; acuminate; awned; awns glabrous, or hairy.

FLOWER Anthers 3; 3 mm long.

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.