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''Haworthia bruynsii'' is a rare species of the genus ''Haworthia'' in the family Xanthorrhoeaceae, endemic to a small area in the Eastern Cape Provinces in South Africa. ==Description== ''Haworthia bruynsii'' is a small, highly truncated species of ''Haworthia''. It remains as a solitary rosette, rarely offsetting, and tends to grow slightly underground, with only the flat, truncated leaf tips appearing at the surface of the ground. It looks very similar to the "retuse" Haworthias, with their characteristically truncated leaves, such as ''Haworthia springbokvlakensis'' which shares its habitat. However it can be distinguished by its brown to dark green colour, and its pad-like leaf tops, which are usually very rough (though occasional populations are smooth). It is extremely unusual in that - while it greatly resembles the "retuse" Haworthias - it is actually a member of the entirely different subgenus ''Hexangulares'', and seems to be a case of parallel evolution in a similar environment. Recent phylogenetic studies have demonstrated that subgenus Hexangulares is actually relatively unrelated to other ''Haworthias'' (being more closely related to ''Gasterias''. It will therefore comprise a new, separate genus, ''Haworthiopsis'', and this species will accordingly become ''"Haworthiopsis bruynsii"''.〔Manning, John; Boatwright, James S.; Daru, Barnabas H.; Maurin, Olivier; van der Bank, Michelle. A Molecular Phylogeny and Generic Classification of Asphodelaceae subfamily Alooideae: A Final Resolution of the Prickly Issue of Polyphyly in the Alooids? Systematic Botany, Volume 39, Number 1, March 2014, pp. 55-74〕〔http://www.haworthia.org.uk/haworthia.htm〕 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「Haworthia bruynsii」の詳細全文を読む スポンサード リンク
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