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Molinia caerulea
''Molinia caerulea'' (purple moor-grass) is a species of flowering plant in the grass family Poaceae, native to Europe, west Asia, and north Africa. It grows in locations from the lowlands up to in the Alps. Like most grasses, it grows best in acid soils, ideally pH values of between 3.5 and 5, however, it can continue to live under more extreme conditions, sometimes to as low as 2. It is common on moist heathland, bogs and moorland throughout Britain. Introduced populations exist in northeastern and northwestern North America.
The specific epithet ''caerulea'' means "deep blue" and refers to the purple spikelets.
==Identification==
''Molinia caerulea'' is an herbaceous perennial bunchgrass (tussock-forming), growing up to tall (taller when sheltered by gorse and heather), with many closely packed stems. The leaves are coarse, green, taper to a point, long, flat and sometimes slightly hairy on top.〔Grasses by C E Hubbard, 1978, published by Penguin books〕 Due to the dense tussock it is very resistant to heath fires. Its ligule is a ring of hairs, as in heath grass (Danthonia decumbens). The long narrow purple spikelets are a major identification feature - the panicle is long.
It flowers between July and September, later than any other species.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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