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Bryophyllum
''Bryophyllum'' (from the Greek ''bryon/bryein'' = sprout, ''phyllon'' = leaf) is a plant genus of the Crassulaceae family that has sometimes been included within the genus ''Kalanchoe''. There are about forty species in the group, native originally of South Africa, Madagascar, and Asia. The group is notable for vegetatively growing small plantlets on the fringes of the leaves; these eventually drop off and root. These plantlets arise from mitosis of meristematic-type tissue in notches in the leaves.
Nowadays, bryophyllums are naturalised in many parts of the tropics, and deliberately cultivated for their attractiveness or for their interesting reproduction.
==Toxicity==
Several species of ''Kalanchoe'' are economically important for causing cardiotoxic effects in sheep and cattle, and diseases affecting the nervous system and muscles known as ''krimpsiekte'' ("shrinking disease") or as cotyledonosis.〔Welham, Marina: (How Dangerous are Euphorbias? (And Others in the Family Euphorbiaceae) with some comments on dangerous plants in the families Agavaceae, Aizoaceae, Apocynaceae, Compositae, Crassulaceae, Liliaceae ). ''The Amateur's Digest''. Retrieved 2007-SEP-19.〕 ''Bryophyllum pinnatum'' may have similar chemical components, bufadienolide alkaloids.〔 (1998): "Bufadienolides of plant and animal origin". ''Nat. Prod. Rep.'' 15(4): 397–413. (PDF fulltext )〕
There are many hybrids within ''Bryophyllum'', and also hybrids with ''Kalanchoe'' such as ''Kalanchoe'' × ''crenatodaigremontiana'' (''B. laxiflorum'' (as the synonym ''B. crenatum'') × ''K. daigremontiana'') or Houghton's Hybrid (''K. daigremontianum'' × ''B. delagoense'').
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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