Quote:
Originally Posted by Tsuchibuta
Also Zygos are in the tribe of Maxillaria.
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Yes, but Cattleyas and Masdevallias are both in the tribe Epidendreae, and a cross between them has never happened, whereas Cattleyas and Laelias share the same
subtribe, Laeliinae, and Cattleyas and Laelias readily interbreed. Another thing, Oncidiums are in tribe Maxillarieae, subtribe Oncidiinae, and even though they are similar to Zygopetalums, there is no registered hybrids between them.