''Bromus japonicus'', the Japanese brome, is an annual
brome grass
''Bromus'' is a large genus of grasses, classified in its own tribe Bromeae. They are commonly known as bromes, brome grasses, cheat grasses, or chess grasses. Estimates in the scientific literature of the number of species have ranged from 100 ...
native to
Eurasia
Eurasia ( , ) is a continental area on Earth, comprising all of Europe and Asia. According to some geographers, Physical geography, physiographically, Eurasia is a single supercontinent. The concept of Europe and Asia as distinct continents d ...
. The grass has a
diploid number of 14.
Description
''Bromus japonicus'' is an annual or biennial tufted grass growing high. The
culms are erect or ascending. The sheaths of the grass are pubescent, though upper sheaths are occasionally glabrous. The pubescent, obtuse
ligule
A ligule (from "strap", variant of ''lingula'', from ''lingua'' "tongue") is a thin outgrowth at the junction of leaf
A leaf (: leaves) is a principal appendage of the plant stem, stem of a vascular plant, usually borne laterally above g ...
s are long. The densely hairy leaf blades are long and wide. The open and