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. Culms erect; slender (1/1); 4–19.5–41 cm long. Lateral branches lacking (1/1). Ligule an eciliate membrane.

INFLORESCENCE Inflorescence a panicle.

Panicle open. Primary panicle branches not whorled (4), or whorled at most nodes (1).

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform (3), or cuneate (2).

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.3–1.9–2.6 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; shorter than spikelet (2), or reaching apex of florets (4), or exceeding apex of florets (1). Lower glume lanceolate (2), or elliptic (1), or ovate (2); 0.8–0.96–1 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface without pits. Lower glume apex obtuse (1), or acute. Upper glume lanceolate (1), or elliptic (1), or oblong (1), or ovate (3); 0.8–1.01–1.5 length of adjacent fertile lemma; membranous; with undifferentiated margins (4), or hyaline margins (1); without keels; 3 -veined. Upper glume apex obtuse (1), or acute; muticous (4), or mucronate (1).

FLORETS Fertile lemma elliptic (4), or oblong (1), or ovate (1); membranous (3), or chartaceous (4); without keel; wingless; 3 -veined. Lemma surface unwrinkled; without grooves; glabrous (1), or pubescent (4); with clavate hairs (4/4). Lemma apex entire (4), or erose (1); obtuse. Palea 0.9–0.95–1 length of lemma; 2 -veined. Palea surface glabrous (1), or pubescent (4).

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp; ellipsoid (1/4), or oblong (2/4), or ovoid (2/4); dorsally compressed (3/3); pitted (1/1). Embryo 0.2 length of caryopsis. Hilum elliptic.

DISTRIBUTION Europe (2), or Temperate Asia.

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