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.

Zenkeria

HABIT Perennial. Culms decumbent (2/2); 10–49–100 cm long; rooting from lower nodes (2/2). Ligule a fringe of hairs. Leaf-blades linear, or lanceolate (1); herbaceous (3), or chartaceous (2); stiff (1), or firm (4). Leaf-blade margins cartilaginous (1/1).

INFLORESCENCE Inflorescence a panicle.

Panicle open.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension (1), or with a barren rhachilla extension (4). Spikelets ovate (2), or cuneate (3); laterally compressed; 2.5–4.138–5.5 mm long; breaking up at maturity; disarticulating below each fertile floret (3), or above glumes but not between florets (2). Rhachilla internodes definite. Floret callus pilose.

GLUMES Glumes persistent; shorter than spikelet; parallel to lemmas (2), or gaping (3). Lower glume lanceolate (1), or oblong (2), or ovate (2); 0.7–0.85–1 length of upper glume; membranous; 1-keeled; 1 -veined (4), or 2 -veined (1), or 3 -veined (2), or 4–5 -veined (1). Lower glume lateral veins absent (3), or distinct (2). Lower glume surface without pits. Lower glume apex acute, or acuminate (2). Upper glume lanceolate (1), or oblong (1), or ovate (3); 0.4–0.645–0.8 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined (4), or 2 -veined (1), or 3 -veined (2), or 4–5 -veined (1). Upper glume apex acute, or acuminate (2).

FLORETS Fertile lemma elliptic (1), or oblong (4); membranous; keeled; wingless; 5 -veined (2), or 7 -veined (3), or 8–9 -veined (2), or 10–11 -veined (1). Lemma midvein without distinctive roughness (2), or scabrous (3). Lemma lateral veins without ribs (2), or ribbed (3). Lemma surface unwrinkled; without grooves; pilose (3), or villous (2); with simple hairs (2), or tubercle-based hairs (3). Lemma apex obtuse (1), or acute (1), or acuminate (3). Palea keels eciliate (3), or ciliate (2). Palea surface glabrous (2), or pilose (3).

FLOWER Lodicules 2; fleshy (3/3). Anthers 2 (3), or 3 (2).

FRUIT Caryopsis with adherent pericarp (3/3); linear (3/3); isodiametric (3/3); biconvex (3/3). Embryo 0.5 length of caryopsis. Hilum punctiform (3/3).

DISTRIBUTION Tropical Asia.

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