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.

Trichopteryx

HABIT Annual (2), or perennial (3). Rhizomes absent (4), or short (1). Culms erect (3), or geniculately ascending (3), or decumbent (1), or prostrate (2); 2–38.1–100 cm long; firm (2), or wiry (3), or woody (1). Ligule a fringe of hairs. Leaf-blades linear (2), or lanceolate (4), or ovate (2). Leaf-blade margins cartilaginous (1/1).

INFLORESCENCE Inflorescence a panicle.

Panicle open.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 2.5–4.2–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose; truncate (1), or obtuse (4).

GLUMES Glumes persistent; reaching apex of florets. Lower glume lanceolate (1), or ovate (4); 0.5–0.581–0.75 length of upper glume; chartaceous; without keels; 3 -veined. Lower glume surface without pits; glabrous (4), or puberulous (1), or pubescent (3), or setose (4). Lower glume apex acute (4), or acuminate (1). Upper glume ovate; chartaceous; without keels; 3 -veined. Upper glume surface glabrous (4), or puberulous (1), or pubescent (3), or setose (4); with simple hairs (1), or tubercle-based hairs (4). Upper glume apex acute.

FLORETS Basal sterile florets male (1), or barren (4); with palea. Lemma of lower sterile floret lanceolate, or elliptic, or oblong, or ovate; chartaceous; 3 -veined; acute. Fertile lemma oblong; chartaceous; without keel; wingless; 5 -veined. Lemma surface unwrinkled; without grooves; glabrous (2), or pubescent (3), or pilose (1); with a transverse row of hair tufts. Lemma margins involute; interlocking with palea keels. Lemma apex lobed; 2 -fid; awned; 3 -awned. Principal lemma awn from a sinus; geniculate. Lateral lemma awns shorter than principal. Palea 2 -veined. Palea keels approximate.

FLOWER Anthers 2.

FRUIT Caryopsis with adherent pericarp; fusiform (1/1). Hilum linear (1/1).

DISTRIBUTION Africa.

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