Species of Masdevallia, Odontoglossum, Lycaste, Phaius, and Zygopetalum have all been intercrossed, and the number of possible combinations admits of incalculable development, especially as the crossing is not confined to the same genus. Plants of distinct genera have been crossed with each other, and in many cases the results have been unexpectedly good, as for example the pretty, scarlet _Cochlioda Noezliana_, which has been crossed successfully with several genera. Such facts as these seem to indicate that there are but few combinations amongst the genera of Orchideae cross-breeders may not attempt with a reasonable hope of success.

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