Jun, 1915,] THE ORCHID REVIEW. 203 
It may, at least, be said that O. crispum grows and hybridises naturally 
with O. gloriosum, O. Iuteopurpureum, O. Lindleyanum, and O. 
Hunnewellianum, yielding the primary hybrids, O. Andersonianum, 
O. Wilckeanum, O. Coradinei, and O. Adriane respectively—the origin 
has now been proved experimentally in every case—and that the hybrids 
are completely fertile, and, so far as they occur together, continue to cross 
back with the parent species and with each other, yielding a series of 
secondary hybrids whose origin it is often impossible to ascertain by 
Fig. 26. ODONTOGLossUM WILCKEANUM ALBENS. 
(? crispum xX luteopurpureum.) ~ 
comparison, because.of the amount of segregation of character and reversiom 
that takes place. 
The limiting phrase “so far as they grow together” is necessary, 
because they do not occur indiscriminately in the same area. O- 
Hunnewellianum and its derivative, O. Adriane, for example, were not 
known until many years later than the others, appearing quite unexpectedly 
when O. crispum was found and imported from a new district, which has 
since yielded also O. gloriosum and O. Andersonianum, so that the latter 
pair occur in both areas. Aguin, differences among the quality of blotched 
“crispums” from different districts have long been recognised, and this 
would result from their varying composition, but how far this can be 
