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 griffithii

HABIT Perennial; caespitose. Culms erect. Culm-internodes smooth. Ligule an eciliate membrane; 1–2 mm long. Leaf-blades conduplicate, or convolute; 7–15 cm long; 2–3 mm wide. Leaf-blade surface scabrous; rough on both sides; glabrous. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; effuse; 9–18 cm long; 4–5 cm wide. Primary panicle branches 4–8 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 3.5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume elliptic; 1.1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma oblong; 3 mm long; membranous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma apex erose; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 5–7 mm long overall; with twisted column. Rhachilla extension pilose.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

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

DISTRIBUTION Asia-temperate: western Asia.

NOTES Aveneae. Fl Iran 1995.

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