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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Dichelachne rara
HABIT Perennial; caespitose. Culms erect; 60–130 cm long; wiry. Culm-internodes smooth, or scaberulous; distally glabrous, or pubescent. Lateral branches lacking. Ligule an eciliate membrane; 1–3 mm long. Leaf-blades 10–17(–25) cm long; 1–4.5 mm wide.
INFLORESCENCE Inflorescence a panicle. Peduncle 25–55 cm long.
Panicle open; oblong; dense; 10–23 cm long; 4–8 cm wide.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear; laterally compressed; 4–8.25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; pubescent. Floret callus hairs 0.5–1.75 mm long.
GLUMES Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 3.25–8.25 mm long; 1 length of upper glume; membranous; 1-keeled; keeled above; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute to attenuate. Upper glume lanceolate; 3.25–8.25 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; keeled above; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute to attenuate.
FLORETS Fertile lemma lanceolate; 4–8 mm long; cartilaginous; keeled; lightly keeled; 5 -veined. Lemma surface asperulous. Lemma margins involute. Lemma apex obtuse (easily splitting); awned; 1 -awned. Principal lemma awn subapical, or dorsal; arising 0.75–0.9 way up back of lemma (0.3–2mm below apex); flexuous; 10–25 mm long overall; 2–4 length of lemma. Palea 3–6.5 mm long; 0.75 length of lemma; 2–4 -veined. Palea keels approximate.
FLOWER Lodicules 2; 0.5–0.75 mm long; glabrous. Anthers 1 (rarely), or 3; 0.75–2.75 mm long; yellow, or purple.
FRUIT Caryopsis with adherent pericarp; sulcate on hilar side; 2.5–3.25 mm long; apex rostrate. Hilum punctiform. Endosperm liquid.
DISTRIBUTION Asia-tropical: Malesia and Papuasia. Australasia: Australia and New Zealand.
NOTES Aveneae. Veldkamp.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
