GrassBase - The Online World Grass Flora


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

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

Aristida queenslandica

HABIT Perennial; caespitose; clumped loosely. Culms erect; 25–100 cm long; 1–2 mm diam.; 2–4 -noded. Culm-internodes smooth, or scaberulous; distally glabrous, or hirsute. Lateral branches lacking, or sparse, or ample, or fastigiate. Leaf-sheaths smooth, or scaberulous; glabrous on surface, or pilose. Leaf-sheath oral hairs ciliate; 1–3 mm long. Ligule a fringe of hairs; 0.2–0.5 mm long. Collar glabrous, or pubescent. Leaf-blades curled; 20–40 cm long; 2 mm wide. Leaf-blade surface scaberulous; rough abaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 9–64 cm long; 2–4.5 cm wide. Primary panicle branches 5–11 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 6.2–10.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 0.5–0.9 mm long; pubescent; acute.

GLUMES Glumes deciduous; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 5.2–11 mm long; 0.8–1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface smooth to scabrous. Lower glume apex acute, or acuminate; mucronate. Upper glume lanceolate; 6.2–10.5 mm long; 0.8–1.2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface smooth to scabrous. Upper glume apex acute, or acuminate; mucronate.

FLORETS Fertile lemma lanceolate; subterete; 5–12 mm long; coriaceous; pallid and light brown; without keel; 3 -veined. Lemma surface scaberulous. Lemma margins involute; covering most of palea; without distinctive roughness. Lemma apex acute; awned; 3 -awned. Principal lemma awn with 8–16 mm long limb; without a column; persistent. Lateral lemma awns 3–10 mm long; shorter than principal. Palea 0.2 length of lemma; without keels.

FLOWER Anthers 3; 0.9–1.9 mm long.

FRUIT Caryopsis with adherent pericarp; sulcate on hilar side; 4.1–6.1 mm long. Hilum linear; 0.3–0.5 length of caryopsis.

DISTRIBUTION Australasia: Australia.

NOTES Aristideae. Simon 1993.

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