November, 1914.] 



THE ORCHID WORIJ). 



31 



Lalio-Callleya luminosa ''Canary" (C. aurea X L. tenebrosa "Walton Grange 

 var"). Sepals and petals canary-yellow. In the Westonbirl collection. 



own characteristic points of formation and 

 colour tint, yet all beautiful and at one time 

 or another valuable plants from a commercial 

 aspect. 



It should further be noted that each of the 

 above hybrids has either Leopoldii or bicolor 

 as one parent, in one case both are present, 

 and an examination of the flowers of these 

 two species will show that they possess a 

 peculiar greenish-yellow tint ; what this is 

 really composed of is more than can be deter- 

 mined, but it appears to be just the material 

 that IS required to produce a bright yellow 

 colour when used in correct proportion with 

 aurea. As proof of this the following crosses 

 have yielded some astonishing results : — 

 Antiope (Chamberlainiana x aurea), Venus 

 (Iris X aurea), Sybil (iridescens x aurea) and 

 Pandemus (Mrs. Mahler x aurea). Of course, 

 reversion has taken an active part, resulting 

 in many undesirable varieties, but against this 

 there has been a satisfactory number of 

 beautiful results, flowers in which the sepals 

 and petals are pure bright yellow, of varying 

 intensity. With regard to size the flowers are 

 not quite so large as that of aurea, but this 



defect may be remedied m course of time by 

 further crossing with carefully selected 

 parents ; probably an additional mating with 

 aurea will produce the desired result. 



An interesting experiment could be carried 

 out by the making of an improved Chamber- 

 lainiana by means of the albino form of 

 Leopoldii, described on page 2 of this volume. 

 There does not appear to be any reason why 

 the albino nature of this particular variety 

 should not be carried forward in the same 

 manner that L. tenebrosa " Walton Grange " 

 variety is perpetuated in certain forms 

 of L.-C. luminosa. L.-C. Mrs. Donald 

 MacMaster (luminosa x aurea) is a recent 

 success, the sepals and petals in many 

 varieties being bright golden-yellow. 



This latter remark brings us to the making 

 of a yellow Cattleya by the assistance of 

 various La^lias ; perhaps yellow Laelio- 

 Cattleyas would be a better term to use, 

 although having regard to the fact that a 

 Laeha has probably been used but once they 

 are more inclined to be Cattleyas than 

 Laelias so far as their actual parentage is 

 concerned. In these we find much use has 



