MARCH, 1917.] THE ORCHID REVIEW. 53 
with nearly uniform green coloration (var. Poggio Gherardo), approaching 
the C. villosum parent in colour, all, however, retaining the hybrid shape. 
A self-fertilised seedling of the striped variety Rossianum shown had 
returned to the more uniform coloration of the original. 
Two species of Cycnoches were also exhibited, showing sexual 
dimorphism. A painting, by Mrs. Ross, of C. Warscewiczii, Rchb. Ei, 
showed male and female flowers on the same infloresence, five females at 
the base and about a dozen of the very different males above. The original 
inflorescence was also shown, this having been sent to Kew when it 
appeared in 1895. It represented a condition of things still almost unique, 
for the sexes are usually borne in several inflorescences on the same bulb, 
as in another drawing of the species also exhibited. Lastly, dried 
inflorescences from the same plant of C. Rossianum, Rolfe, were exhibited 
to show their remarkable difference, and the altogether disproportionately 
large size of the females. 
iF 
LEAF-STRUCTURE OF HYBRID ORGHIDS. kj 
T the meeting of the Linnean Society held on February 1st, Sir David 
Prain, C.M.G., F.R.S., in the Chair, there was an interesting 
communication from Messrs. J. Charlesworth and J. Rambottom, F.L.S., 
‘On the Structure of the Leaves of Hybrid Orchids,” illustrated by a series 
of lantern projections of a series of microscopic slides made by Mr. 
Charlesworth. 
Mr. Rambottom remarked that an investigation of the various 
anatomical characters of the leaves of the parents and their hybrids— 
cuticle, epidermis, water-storage tissue, mesophyll, vascular bundles, 
sclerenchyma, structure and shape of midrib, &c.—shows that, as a general 
rule, a structure, when present in both parents in different amounts, 
appears in the hybrid intermediate in every way-—quantity, distribution, 
size, and shape of parts, &c. This can be well seen by observing the 
microscopic characters of hybrids which have one parent in common; 
Cochlioda Netzliana occurs as the female parent in six of the primary 
hybrids investigated, also being concerned in the parentage of the two 
secondary ones; and the water-storage tissue and the number of rows of 
vascular strands show the point very clearly. When a character is present 
in one of the parents, it may or may not be found in the hybrid; ¢.g., the 
leaf of Epidendrum prismatocarpum shows a large amount of crystalline 
substance; the leaves of the hybrid Lelia cinnabarina X E. prismatocarpum 
show these crystals, but not in such great quantity; the leaves of the hybrid 
Laelia tenebrosa X E. prismatocarpum, on the other hand, do not show any 
