Pre THE ORCHID REVIEW. [FEBRUARY, 1903. 
PAPHIOPEDILUM x SIAMENSE. 
It has already been recorded that an experiment was in progress, in the 
collection of Reginald Young, Esq., Sefton Park, Liverpool, to demonstrate 
the origin of the above interesting plant, and now the result can be recorded. 
Two seedlings have flowered, and Mr. Young has kindly sent one of the 
plants, and the flower of the other, to show that they are identical with the 
wild plant. Mr. Young writes as follows :— 
‘“‘T am sending you a plant in flower of my home-raised Paphiopedilum 
X siamense (P. Appletonianum ¢ xX callosum $), together with a cut 
flower of a second seedling. This appears to me to be a satisfactory 
. Fic. 11. PapHIOPEDILUM xX SIAMENSE, with its two parents, 
- CALLOSUM, fig: 12 (in the centre), and P. APPLETONIANUM, fig. 13 (on the right). 
ending to an experimental operation, and justifies your remarks as to the 
probable origin of this plant. The progress of the experiment has been 
recorded from time to time, and it may be interesting to bring togethet 
the history of the question :— 
“In 1895 you called attention to a published remark that we had ‘n0 
undoubted natural hybrid’ in the genus, and stated your belief that the 
plant now under discussion had such an origin, for the known examples 
had been imported with P. callosum, from Siam, and now there was 
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