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Carex pilulifera
''Carex pilulifera'', the pill sedge, is a European species of sedge found in acid heaths, woods and grassland from Macaronesia to Scandinavia. It grows up to tall, with 2–4 female spikes and 1 male spike in an inflorescence. These stalks bend as the seeds ripen, and the seeds are collected and dispersed by ants of the species ''Myrmica ruginodis''.
==Description==
The culms of ''Carex pilulifera'' grow to a length of , and are often noticeably curved. The leaves are long and wide, and are fairly flat.〔 The rhizomes of ''C. pilulifera'' are very short, giving the plant a caespitose (densely tufted) appearance.〔 The tussock grows outwards through the production of annual side-shoots.〔
The inflorescence comprises a single, terminal, male (staminate) spike, and 2–4 lateral female (pistillate) spikes.〔 The spikes are clustered together, and the whole inflorescence is long.〔 The female spikes are long, ovoid or approaching spherical,〔 and contains 5–15 flowers.〔 The female spikes are attached directly to the stem, and each is subtended by a bract which does not form a sheath.〔 The male spike is long and much narrower.〔
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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