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 pseudoramosus

HABIT Perennial; caespitose; clumped loosely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms erect; 60–120 cm long; 5–8 -noded. Culm-internodes smooth; distally glabrous. Leaf-sheaths glabrous on surface, or pilose. Leaf-sheath auricles absent, or falcate. Ligule an eciliate membrane; 1.5 mm long; brown. Leaf-blades 15–45 cm long; 3–9 mm wide. Leaf-blade surface scaberulous; rough abaxially; pilose; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; 15–30 cm long. Primary panicle branches reflexed; 2 -nate; bearing 1–3 fertile spikelets on each lower branch. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5–8 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or elliptic; laterally compressed; compressed slightly; 18–25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2 mm long; pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 9–11 mm long; 0.75–0.85 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume margins ciliolate. Lower glume apex acute; muticous, or mucronate. Upper glume lanceolate; 11–13 mm long; 0.9 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume margins pubescent. Upper glume apex acute; muticous, or mucronate.

FLORETS Fertile lemma lanceolate, or elliptic; 12–15 mm long; herbaceous; without keel; 7 -veined. Lemma margins ciliate. Lemma apex acute; awned; 1 -awned. Principal lemma awn apical; 5–14 mm long overall. Palea 1 length of lemma. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 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. Keng 2000.

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