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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 strictus

HABIT Perennial. Rhizomes short. Culms erect, or geniculately ascending; 25–35 cm long; 3 -noded. Culm-nodes glabrous. Leaves basal and cauline. Ligule a fringe of hairs. Leaf-blades convolute; 1–15 cm long; 2 mm wide; stiff. Leaf-blade apex pungent.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform, or capitate; oblong; 1–2 cm long; 0.5 cm wide. Primary panicle branches accrescent to a central axis; with evident branchlets on axis.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong.

STERILE SPIKELETS Basal sterile spikelets absent, or rudimentary; 0–3 in number.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 8–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief; pubescent; disarticulating obliquely.

GLUMES Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 4–6 mm long; 0.8 length of upper glume; membranous; without keels; 3 -veined. Lower glume apex acute. Upper glume ovate; 5–7 mm long; 0.8 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma oblong; 6–8 mm long; coriaceous; without keel; 3 -veined. Lemma midvein pubescent; hairy below (in 2 lines). Lemma surface pubescent; hairy below; hairy on veins. Lemma margins involute. Lemma apex lobed; 3 -fid; with lanceolate lobes; incised 0.66 of lemma length; acute; awned; 3 -awned. Principal lemma awn 2–3.5 mm long overall; limb ciliate; glabrescent towards tip. Lateral lemma awns arising on apex of lobes; 2–3.5 mm long; subequal to principal; ciliate. Palea oblong; 0.9 length of lemma; 2 -veined; without keels. Palea apex dentate; 2 -fid; acuminate; awned; awns 2 mm long; awns hairy.

FLOWER Anthers 3; 3.5–4 mm long.

FRUIT Caryopsis with free soft pericarp.

DISTRIBUTION Australasia: Australia.

NOTES Arundineae. Tothill.

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