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.

Dupontia

HABIT Perennial. Rhizomes elongated. Culms erect; 10–25 cm long. Ligule an eciliate membrane.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 4–8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite. Floret callus pilose.

GLUMES Glumes persistent; reaching apex of florets. Lower glume ovate; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface without pits. Lower glume apex acute. Upper glume ovate; 1–1.1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma elliptic; membranous; much thinner above; keeled; wingless; 3–5 -veined. Lemma lateral veins obscure; less than two thirds length of lemma. Lemma surface unwrinkled; without grooves. Lemma apex obtuse, or cuspidate. Palea 1 length of lemma; 2 -veined.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp. Hilum elliptic.

DISTRIBUTION Europe, or Temperate Asia, or North America.

Please cite this publication as detailed in How to Cite Version: 27th January 2014.