The karyotypes of
Eucomis, Camassia, Yucca Dasylirion, Dracaena,
Agave, Fourcroya, Beschorneria and
Polianthes have been analyzed with special reference to the
Yucca-Agave karyotype (5L+25S).
Yucca, Hesperoyucca,
Hesperoalve, Cleistoyucca and
Samuela in Yucceae and
Agave,
Fourcroya, Polianthes and
Beschorneria in Agavoideae are of the same karyotype and are more closely akin to each other than it is shown by their classification into distinct families.
Dasylirion, Nolina, Dracaena and
Doryanthes also make another group of a karyotype. The present observation of polyploidy in
Agave suggests that this
Yucca-Agave type is a very stable karyotype.
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