IV INTRODUCTORY. 



tions. Cypripedium Boxalli, considered once, even by Mr. 

 Rolfe, nothing but a variety of Cpd. villosum,* is now 

 accepted as a ladyslipper sufficiently distinct to admit the 

 crosses raised with it independently into our nomenclature, 

 and I give a new key to Boxalli as well as villosum. 



I ask the forbearance of my readers for the delay in the 

 issue of the second supplement, brought about through a 

 change of residence. I print the matter on one side only, to 

 enable those desiring such an opportunity to insert these 

 pages on fly-leaves in the volume first published. 



Of new abbreviations I use: 



Bhf. Dct. for E. Bohnhof, Dictionaire des Orchidees Hy- 

 brides. 



Chrlw. Ctlg. for Charlesworth & Co.'s catalogue, 1895. 



I repeat that all citations about orchids exhibited at the 

 Royal Hort. Soc., London, are taken from the columns of 

 Gardeners' Chronicle. If from any other journal, abbrevia- 

 tions used for them are added in parentheses, viz., "RHS. 

 (Gdn.)," or "RHS. (0. R.)," for the reports in the Garden or 

 Orchid Review. GEO. HANSEN, 



Berkeley, CaL, Feb. 20, 1897. 

 *See 0. R., Sept, ; 94, p. 269. 



