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.

Pentameris hirtiglumis

HABIT Perennial; cushion forming, or caespitose; clumped densely. Culms decumbent; 20–75 cm long. Leaf-sheaths loose; glabrous on surface, or pubescent; outer margin hairy. Ligule a fringe of hairs. Leaf-blades curved; convolute; 10–20 cm long; 1–1.5 mm wide; coriaceous.

INFLORESCENCE Inflorescence a panicle; comprising 15–20 fertile spikelets.

Panicle open; lanceolate; 7.5–11 cm long; 2–3.5 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 14.5–21.5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; exceeding apex of florets. Lower glume lanceolate; 14.5–21.5 mm long; 1 length of upper glume; membranous. Lower glume surface hirsute. Lower glume apex attenuate. Upper glume lanceolate; 14.5–21.5 mm long; membranous. Upper glume surface hirsute. Upper glume apex attenuate.

FLORETS Fertile lemma oblong; 3.8–5.7 mm long; membranous; without keel. Lemma apex lobed; 2 -fid; with lobes 1–2 mm long; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; 11.5–17 mm long overall; with twisted column. Column of lemma awn 4–6 mm long. Lateral lemma awns arising on inner edge of lobes; 3–6.5 mm long; shorter than principal. Palea 4–4.5 mm long; 2 -veined.

FLOWER Lodicules 2; cuneate; glabrous. Anthers 3; 3.5–5 mm long.

FRUIT Caryopsis with free brittle pericarp; fusiform; 2.4 mm long; hairy at apex.

DISTRIBUTION Africa: south.

NOTES Arundineae. Barker 2002.

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