BIGENERIC ORCHID HYBRIDS. 163 
the possibility of the whole of the tropical species of these two 
genera being ultimately connected in this manner. 
We have now the question of hybridism between distinct 
genera to consider, and, as before, the results obtained can best 
be expressed in diagrammatic form. 
Tasue III, showing the connections which have been obtained 
between distinct genera by artificial hybridization. 
248 Hxmaria. 42 Acanthephippium. 
240 Ancectochilus. 43 Phaius. 
60 
249 Dossinia. =O 
Macodes. viden. the. 
107 Zygopetalum. ) O 
/ 44 Bletia. 
/ 45 Chysis. RR 
/ 119a Colax. 88 Sophronitis. 
O 119 Lycaste. Cattleya. 
154 Odontoglossum. 
Four distinct diagrams are here represented, and with no con- 
nection between them, though it is convenient to place them side 
by side. The thick lines represent bigeneric hybrids which have 
flowered and been described; the thin ones represent crosses 
which have been effected and capsules produced, but from which 
no seedlings were raised *. The numbers preceding the names 
* “When we enumerate the capsules which have been obtained from bige- 
neric crosses, but from which no seedlings have been raised, the list is some- 
what more formidable. Some of the most remarkable of these were produced 
by Acanthephippium Curtisii x Chysis bractescens, Bletia hyacinthina x Calanthe 
masuca, Chysis aurea x Zygopetalum Sedeni [itself a hybrid.—R. A. R.], Odon- 
toglossum bictoniense x Zygopetalum marillare, and Zygopetalum Mackayi x 
Lycaste Skinneri. But, on the other hand, we have obtained large number 
of capsules of the normal size, and to all appearance externally perfect, not 
only from bigeneric crosses, but even between species of the same genus, which 
contained not a single seed. And, lastly, I may note that Zygopetalum Mackayi 
has been crossed with several species of Odontoglossum, and seedlings raised 
from some of the crosses; but every one that has yet flowered has proved to 
be Zygopetalum Mackayi.”—Veitch, Journ. Hort. Soc. n. s. vii. p. s 
P 
