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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 latiglumis
HABIT Perennial. Culms erect; 75–125 cm long; 8–15 -noded. Leaf-sheaths longer than adjacent culm internode; pilose. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles falcate. Ligule an eciliate membrane; 0.7 mm long. Leaf-blades 15–25 cm long; 6–11 mm wide. Leaf-blade surface glabrous.
INFLORESCENCE Inflorescence a panicle.
Panicle open; pyramidal; 12–20 cm long. Panicle branches scabrous; pubescent in axils.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 4–8 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 15–25 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes persistent; shorter than spikelet. Lower glume lanceolate; 4.5–6.5 mm long; 0.75 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface pubescent. Lower glume apex acute. Upper glume lanceolate; 6.5–8.5 mm long; 0.66–0.75 length of adjacent fertile lemma; membranous; without keels; 3–5 -veined. Upper glume surface pubescent. Upper glume apex obtuse, or acute; mucronate.
FLORETS Fertile lemma oblong; 10–12 mm long; chartaceous; without keel; 5–7 -veined. Lemma surface pubescent; hairy all along. Lemma apex awned; 1 -awned. Principal lemma awn subapical; 4–5 mm long overall. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; membranous. Anthers 3; 1.5–2.8 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 North America: north-central USA, northeast USA, and southeast USA.
NOTES Bromeae. Gr Indiana 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.