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 minima

HABIT Perennial; cushion forming. Culms erect; 2–5 cm long. Leaf-sheaths glabrous on surface. Ligule a ciliolate membrane; 0.3 mm long; truncate. Leaf-blades curved; conduplicate, or involute; 0.5–1 cm long; 1 mm wide. Leaf-blade margins ciliate. Leaf-blade apex obtuse.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; 1–1.5 cm long; 0.4–0.6 cm wide; bearing few spikelets.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels glabrous, or puberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5–5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.5–0.7 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 5–5.5 mm long; 1.3–1.4 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 3.7–4 mm long; membranous; without keel. Lemma surface smooth, or scaberulous. Lemma apex erose; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1–0.2 way up back of lemma; geniculate; 4.5–4.8 mm long overall; with twisted column. Rhachilla extension 0.6–0.8 mm long; pubescent; with 0.6–1 mm long hairs.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.

DISTRIBUTION South America: western South America.

NOTES Aveneae. Tovar 1995.

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