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''Oroya'' is a genus of cacti (family Cactaceae), originating from Peru. The name comes from the Peruvian town of la Oroya where the first plants were discovered.〔http://www.cactiguide.com/cactus/?genus=Oroya〕 ''Oroya'' species are solitary with a globular form and many ribs with usually-dense pectinate spines. Usually up to 13 inches (32 cm) high, and 9 inches (22 cm) in diameter.〔 Small flowers (up to 1 cm in diameter) grow along a ring near the top of the plant. The flowers are yellow, but their stems are often pink or red.〔 ==References and external links== * (photos on www.cactiguide.com ) 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「Oroya」の詳細全文を読む スポンサード リンク
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