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Descriptions

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

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

Austroderia splendens

HABIT Perennial; caespitose; clumped densely. Culms robust; 300–600 cm long. Leaf-sheaths glabrous on surface, or pilose; outer margin glabrous, or hairy. Ligule a fringe of hairs. Leaf-blades 200–300 cm long; 30–50 mm wide; firm. Leaf-blade surface scaberulous. Leaf-blade margins scaberulous.

INFLORESCENCE Gynodioecious ("male", in this context, indicating the bisexual state). Inflorescence a panicle.

Panicle open; elliptic; dense; nodding; 75 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 22–50 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent.

GLUMES Glumes similar; exceeding apex of florets; similar to fertile lemma in texture; shiny; gaping. Lower glume linear; 22–50 mm long; 1 length of upper glume; hyaline; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex setaceously attenuate. Upper glume linear; 22–50 mm long; 2–5 length of adjacent fertile lemma; hyaline; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex setaceously attenuate.

FLORETS Fertile florets female. Fertile lemma lanceolate; 10 mm long; hyaline; shiny; without keel; 3 -veined. Lemma surface plumose; hairy below. Lemma hairs 10 mm long. Lemma apex lobed; 2 -fid; with filiform lobes; with lobes 4–7 mm long; attenuate; awned; 1 -awned. Principal lemma awn from a sinus; 10–15 mm long overall. Palea 6–9 mm long; hyaline; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; cuneate; fleshy; ciliate. Anthers 3; 3–5 mm long.

FRUIT Caryopsis with adherent pericarp.

MALE Male inflorescence bisexual similar to female; a panicle. Male spikelets resembling female.

DISTRIBUTION Australasia: New Zealand.

NOTES Arundineae. Connor 1993.

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