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.


HABIT Annual (4), or perennial (1). Culms erect, or geniculately ascending (1); 7–34.3–80 cm long. Ligule an eciliate membrane. Leaf-blades filiform; stiff (1), or firm (4).

INFLORESCENCE Inflorescence a panicle.

Panicle open (4), or contracted (1).

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 2.5–3.8–5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; glabrous (1), or pilose (4). Floret callus pubescent (2), or pilose (1), or bearded (2).

GLUMES Glumes persistent; exceeding apex of florets. Lower glume lanceolate; 0.75–0.89–1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface without pits. Lower glume apex acute (4), or acuminate (1). Upper glume lanceolate (4), or ovate (1); 1.8–2.23–3 length of adjacent fertile lemma; membranous; with undifferentiated margins (4), or membranous margins (1); 1-keeled; 1 -veined. Upper glume apex acute (4), or acuminate (1).

FLORETS Fertile lemma ovate; hyaline (1), or membranous (4); without keel; wingless; 5 -veined. Lemma lateral veins obscure. Lemma surface unwrinkled; without grooves. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; with scarcely tapering limb (1), or with clavate limb (4). Column of lemma awn with bearded apex.

FLOWER Anthers 3 (4/4). Ovary glabrous (4/4).

FRUIT Hilum punctiform (4/4).

DISTRIBUTION Europe (4), or Africa (3), or Temperate Asia (2), or Australasia (1), or North America (1), or South America (2).

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