而且,十二卷也没有分为三个属,只是十二卷属下有三个子属。
原文如下:
SubdivisionsThe classification of the flowering plant subfamily Asphodeloideae is weak, and concepts of the genera are not well substantiated. Haworthia is similarly a weakly contrived genus. Because of their horticultural interest, its taxonomy has been dominated by amateur collectors, and the literature is rife with misunderstanding of what the taxa actually are or should be. Currently, this relatively loose genus is subdivided into three very distinct groups, traditionally labelled as sub-genera: - Haworthia, c. 42 spp. Typically green, stemless, soft-leaved species
- Hexangulares (or genus Haworthiopsis, G.D.Rowley), 18 spp. Hard-leaved and sometimes stemmed species
- Robustipedunculares (or genus Tulista, Raf.), 4 spp. Robust, hard-leaved species
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