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''Schlumbergera russelliana'' is a species of plant in the Cactaceae family. It is endemic to a small area of the coastal mountains of south-eastern Brazil where its natural habitat is moist forest. It grows on trees as an epiphyte. It is one of the parents of many of the popular houseplants known as Christmas Cactus or Thanksgiving Cactus.〔 ==Description== ''Schlumbergera russelliana'' resembles other species of the genus ''Schlumbergera'' in that it has leafless green stems which act as photosynthetic organs. The stems (cladodes) are composed of strongly flattened segments, which have a small number of notches along their edges. Individual segments are about long by wide.〔 Special structures characteristic of cacti, called "areoles", occur in the notches at the side of a segment and at the end. The areoles, which bristles up to long, are where the flower buds appear. The flowers hang downwards and are radially symmetrical (regular). They are about long by across. The tepals, which are of various shades of pink, are arranged in two groups, giving the appearance of a "flower within a flower". The inner tepals are longer and fused together at the base to form a floral tube about long; nectar is produced at the base of this tube. Plants flower in the spring; when cultivated in the Northern Hemisphere the flowering period is February to April.〔 A characteristic of the genus ''Schlumbergera'' is that the many stamens are arranged in two series: the inner stamens form a ring around the style; the outer stamens arise from the floral tube. The stamens are pale pink with pink pollen. The style has six to eight lobes at its end and is darker pink.〔 The fruit is greenish-yellow, with four to five ribs. The shiny seeds are dark brown, each with a diameter of about .〔 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「Schlumbergera russelliana」の詳細全文を読む スポンサード リンク
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