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 macbridei

HABIT Perennial; caespitose. Culms erect; 35–50 cm long. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 0.8–1.5 mm long; pubescent on abaxial surface. Leaf-blades 4–7 cm long; 1.5–3 mm wide. Leaf-blade surface pubescent; densely hairy; hairy abaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; 6–9 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

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 0.5–0.6 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 5–5.5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 5–5.5 mm long; membranous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 3.5–4 mm long; cartilaginous; without keel; 5 -veined. Lemma apex erose; awned; 1 -awned. Principal lemma awn dorsal; geniculate; 5.5–6 mm long overall; with twisted column. Rhachilla extension 0.8 mm long; pubescent; with 0.5–1 mm long hairs.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION South America: western South America.

NOTES Aveneae. Gr Peru 1997.

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