THE ORCHID REVIEW. 17 
CYPRIPEDIUM x SIAMENSE. 
THE group figured to-day is a particularly int ing one, rep ing the 
natural hybrid Cypripedium x siamense (whose history was given at p. 20 
of the last volume), together with its two parents. In 1889 Messrs. Veitch 
wrote—‘ No Cypripedium having the aspect of being a natural hybrid between 
two recognised species has ever yet appeared among importations of the 
species” (Man., IV., p. 70), but at the present time four such are 
known, C. X Littleanum and C. x Kimballianum having appeared last year. 
C. X SIAMENSE (fig. 1) originally appeared in the collection of R. H. 
Measures, Esq., of Streatham, in 1888, among plants of the original importa- 
tion of C. callosum imported by M. Regnier. Reichenbach gave the name C. 
Fig I.—cyYPRIPEDIUM X SIAMENSE. Fig?3.—C. APPLETONIANUM. 
Fig 2.—c. CALLOSUM. 
callosum var. subleve (Gard. Chron., 1888, i., p. 331), remarking—“ It might 
be supposed to be a natural hybrid, but I do not believe it . . . M. Regnier 
would have brought the other species.” A year later it appeared with M. J. 
Garden, of Paris, and was independently described under its present name 
(Rolfe, in Gard. Chron., 1889, i., p. 192), its hybrid origin not then being 
suspected. Subsequently plants appeared in other collections, generally 
unexpectedly among C. callosum. The significance of these facts afterwards 
came out when Messrs. Hugh Low & Co. introduced another species in 
quantity, together with C. callosum. In 1894 a plant flowered out of this 
