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.

Pseudopentameris

HABIT Perennial. Culms geniculately ascending (1/1); 30–76.66–120 cm long. Ligule a fringe of hairs. Leaf-blades stiff (2), or firm (1).

INFLORESCENCE Inflorescence a panicle.

Panicle contracted.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets, or 3 fertile florets (2); without rhachilla extension (1), or with a barren rhachilla extension, or with diminished florets at the apex (2). Spikelets lanceolate; laterally compressed; 30–43–60 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite. Floret callus brief (1), or elongated (2); pubescent (1/2), or bearded (1/2); obtuse (2), or pungent (1).

GLUMES Glumes persistent; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; scarious; without keels; 3–4 -veined (2), or 5–7 -veined, or 8–9 -veined (1). Lower glume surface smooth (2), or asperulous (1); without pits. Lower glume apex attenuate. Upper glume lanceolate; 3–4.333–6 length of adjacent fertile lemma; scarious; without keels; 3–4 -veined (2), or 5–7 -veined, or 8–9 -veined (1). Upper glume apex attenuate.

FLORETS Fertile lemma oblong; subterete; cartilaginous (1), or coriaceous (2); without keel; wingless; 9 -veined, or 10–11 -veined (1). Lemma surface unwrinkled; without grooves; pubescent (1), or pilose (2). Lemma margins involute; interlocking with palea keels. Lemma apex lobed; 2 -fid; incised 0.3–0.325–0.4 of lemma length; acute (1/1), or acuminate (1/1); awned; 3 -awned. Principal lemma awn from a sinus; geniculate. Lateral lemma awns shorter than principal. Palea 1 length of lemma. Palea apex dentate (1/1). Apical sterile florets 0–1 in number (2/2); barren (2/2); lanceolate (2/2).

FLOWER Lodicules 2 (1/1); glabrous (1/1), or ciliate (1/1). Anthers 3 (1/1). Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; fusiform. Hilum linear; 0.8 length of caryopsis.

DISTRIBUTION Africa.

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