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.

Deyeuxia cleefii

HABIT Perennial; caespitose. Basal innovations intravaginal. Culms erect; 10–25 cm long. Culm-internodes distally glabrous. Leaf-sheaths 1–2 cm long; glabrous on surface. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades convolute; 2–5 cm long; 1 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle. Peduncle 6–11 cm long.

Panicle open; lanceolate; 3–6 cm long; 0.5–1 cm wide. Primary panicle branches whorled at most nodes.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels glabrous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4–6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.2 mm long. Floret callus bearded. Floret callus hairs 2.3–3.5 mm long; 1.1–1.3 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 4 mm long; 0.9 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex acute. Upper glume lanceolate; 4.5 mm long; 1.3 length of adjacent fertile lemma; membranous; 1-keeled; 5 -veined. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 2.2–2.6 mm long; hyaline; without keel; 5 -veined. Lemma surface scaberulous. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; straight; 5 mm long overall; with twisted column. Palea 2 mm long. Palea keels scabrous. Rhachilla extension 2 mm long; villous.

FLOWER Lodicules 2. Anthers 3; 1.5 mm long; yellow.

FRUIT Caryopsis with adherent pericarp; oblong; 1.25 mm long; light brown. Embryo 0.33 length of caryopsis. Endosperm soft.

DISTRIBUTION South America: western South America.

NOTES Aveneae. Escalona 2004.

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