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''Echinocactus'' is a genus of cacti in the subfamily Cactoideae.〔 The generic name derives from the Ancient Greek εχινος (''echinos''), meaning "spiny," and ''cactus''. It and ''Ferocactus'' are the two genera of barrel cactus. Members of the genus usually have heavy spination and relatively small flowers. The fruits are copiously woolly, and this is one major distinction between ''Echinocactus'' and ''Ferocactus''. Propagation is by seed. Perhaps the best known species is the golden barrel (''Echinocactus grusonii'') from Mexico, an easy-to-grow and widely cultivated plant. Though common in the houseplant and landscape industry, the golden barrel has become very rare in habitat. ==Selected species== *''Echinocactus grusonii'' Hildm. – Golden Barrel Cactus *''Echinocactus horizonthalonius'' Lem. – Devil's Head, Silverbell Cactus, Turk's Head Cactus * *''Echinocactus horizonthalonius'' var. ''horizonthalonius'' * *''Echinocactus horizonthalonius'' var. ''nicholii'' L.D.Benson *''Echinocactus parryi'' *''Echinocactus platyacanthus'' Link & Otto – Giant Barrel Cactus *''Echinocactus polycephalus'' Engelm. & J.M.Bigelow – Cottontop Cactus * *''Echinocactus polycephalus'' var. ''polycephalus'' * *''Echinocactus polycephalus'' var. ''xeranthemoides'' J.M.Coult. *''Echinocactus texensis'' Hopffer – Horse Crippler, Devil's Pincushion 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Echinocactus」の詳細全文を読む スポンサード リンク
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