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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Bromus plurinodis

HABIT Perennial; caespitose; clumped loosely. Culms erect; 40–120 cm long. Culm-internodes smooth; distally glabrous. Leaf-sheaths antrorsely scabrous; pilose. Leaf-sheath auricles falcate. Ligule an eciliate membrane; 2–5 mm long. Leaf-blades 2–5 mm wide. Leaf-blade surface scaberulous; rough on both sides; pubescent; sparsely hairy; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; effuse; 15–30 cm long. Primary panicle branches bearing 1 fertile spikelets on each lower branch. Panicle branches capillary; scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 9–15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 3.5–6.5 mm long; 0.5–0.66 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface asperulous; rough on veins. Lower glume apex acuminate. Upper glume lanceolate; 7–10 mm long; 1 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume surface asperulous; rough on veins. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 7–10 mm long; herbaceous; much thinner on margins; keeled; 3 -veined. Lemma surface scabrous; rough on veins; puberulous; hairy at base. Lemma apex awned; 1 -awned. Principal lemma awn apical; straight, or curved; 10–15 mm long overall. Palea 1 length of lemma. Palea keels scabrous; eciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 2.2–3.2 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-temperate: China.

NOTES Bromeae. Pl Cent Asia 1996.

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