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.

Bromus timorensis

HABIT Perennial; caespitose. Basal innovations extravaginal. Culms erect, or geniculately ascending; 45–90 cm long; 3 -noded. Culm-nodes pubescent. Lateral branches lacking. Leaf-sheaths puberulous to pilose; with tubercle-based hairs. Ligule an eciliate membrane; 0.9–2 mm long; truncate, or acute. Leaf-blades 20–27 cm long; 4–7 mm wide; flaccid. Leaf-blade surface scabrous; rough on both sides; glabrous to pilose; hairy adaxially.

INFLORESCENCE Inflorescence a panicle. Peduncle pubescent above.

Panicle open; nodding; 16–17 cm long; 3–3.5 cm wide. Primary panicle branches 2 -nate; 4–8.5 cm long; bearing 2–4 fertile spikelets on each lower branch. Panicle axis smooth, or scaberulous. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets with diminished florets at the apex. Spikelets laterally compressed; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2.75–2.85 mm long; pubescent. Floret callus pilose; disarticulating obliquely; with circular scar.

GLUMES Glumes persistent; shorter than spikelet. Lower glume linear, or lanceolate; 7.5–9 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute; muticous, or mucronate. Upper glume lanceolate; 9.5–11.5 mm long; 0.75 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume apex acute; muticous, or mucronate.

FLORETS Fertile lemma linear, or lanceolate; 13–14.5 mm long; chartaceous; without keel; 3–7 -veined. Lemma lateral veins with distinct primaries but obscure intermediates. Lemma surface puberulous. Lemma apex awned; 1 -awned. Principal lemma awn subapical; 5–10 mm long overall. Palea 9.5–10.5 mm long; 0.7–0.75 length of lemma. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 3.75 mm long. Ovary with a fleshy appendage above style insertion; pubescent on apex.

FRUIT Caryopsis with adherent pericarp; hairy at apex; apex fleshy. Hilum linear.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Bromeae. Veldkamp 1994.

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