EXTRACTS OF PROCEEDINGS. 



iv 



The question has occurred to me whether the white varieties of 

 flowers are not formed among plants in a similar order. We 

 have an example in the blanching of the old flowers of Franciscea. 

 Then again in the poor varieties of Vanda ccerulea, the petals 

 are almost white with very pale blue veining. In Cattleya, the 

 colour of the petals and lip disappears, leaving the yellow throat 

 and the pale pink tint (which so often spoils a white Cattleya 

 from a florist's point of view), as the remains of the red tint in 

 the mauve colour. Therefore, as yellow is so persistent, we can- 

 not expect an albino of 0. citrina to appear amongst our white 

 varieties. The white Odontoglossum crispum is due to the dis- 

 appearance of the brown blotches, leaving only the yellow mark- 

 ings on the column ; and in the case of the yellow 0. triumphans, 

 which is a poor form of the ordinary type, the brown blotches 

 are either absent or are in process of disappearance. The only 

 pure white forms of Orchids are Coelogyne cristata alba, Dendro- 

 bium Kingianum album, and Saccolabium Heathii." [Calanthe 

 vestita, var. nivalis, is another purely white orchid, and there 

 may be others.] 



Primrosewith Foliaceous Corolla. — Mr. Douglas sent a plant 

 with the corolla foliaceous ; the calyx was normal. It is a not 

 uncommon form. 



RULES FOR THE NAMING OF ORCHIDS 

 FOR GARDEN PURPOSES. 



Adopted by the Council, May 13, 1890. 



Sect. I.— Geneka, Species, well-marked Varieties, and 

 Natural Hybrids. 



1. The names of natural genera, species, and well-marked 

 varieties, as well as of presumed wild hybrids, shall be written 

 so as to accord with botanical language and usage, and to 

 conform with the laws of botanical nomenclature (Lois de la 

 Nomenclature Botanique) as adopted at the International 

 Botanical Congress at Paris in 1867. 



2. Exhibitors showing, for the first time, a plant under a 

 Latin name, shall be required to furnish the name of the botanist 

 who has described the plant. 



