are no line rose- enna no true bles, md even the blue-violets are 
rare and much neutralized. Visually, we recognize blue and pink | 
toned Irises, but they are blue, or pink, only by comparison with 
other Irises. Both the yellow and violet hues become deeper as 
they approach red, and lighter as they tend toward green and blue 
respectively, and only in varieties of comparatively recent introduc- __ 
tion do we discover these hues at the extreme limit of the range. I 
think that further investigation would reveal that each year the color 
range of garden Irises was increased, and the mere listing of the 
=. 
color terms suggests that new developments in coloration will be - 
toward light tints of pink, blue, and yellow green, and toward dark 
shades of red. If Iris colors were simple pigments we might visua- 
lize and actually produce Iris of every hue, at least in the neutra- 
lized tones, in fact, however, certain colors are found almost without 
exception in certain parts of the flower, and not elsewhere, so that 
it is not inconceivable that certain kinds of colors are inherently 
« linked » with what we might call a factor of distribution or loca- 
lization. 
The question of real interest to the hybridizer is whether and to 
what extent, he may break this linkage of characters and by careful 
breeding recombine them. Visually, we discriminate not only be- 
tween the colors themselves, but between self-colored, bicolored, and 
_ what we are accustomed to call plicata Irises. Furthermore, within 
the bicolored division we may distinguish what I call a « solid 
bicolor », such as Oriflamme, from a « velvety bicolor » like Sou- 
_ venir de Mme Gaudichau, or a « veined bicolor » like Her 
Majesty. You will note that I now disregard mere difference in 
color and consider its distribution only. Distribution is less difficult 
of exact definition than color, for who can draw a concise line bet- 
_ ween light and dark, or red-and blue-purple? 
Practically all varieties show traces of reticulation at the base of 
_ the petals; in cypriana, this is yellowed; in pallida, blue-toned; in 
variegata, red-toned. We have no examples of yellow venation of 
_ the blade, although often the vein color is modified by a yellow sap, 
_ or ground color, and curiously enough, we find true red only as a 
_ vein color in varieties of variegata strain. Throughout this paper, I 
use the word « venation » as applied to the presence of veins on the 
_ blade of the fall, and extending beyond the beard. From research 
Se 
through hybridization this « venation », seems to be a typical, and 
_ usually a dominant character of Barton ate: its presence is a proof of 
_ variegata blood. The experiments of MM. Dykes and Bliss prove 
_ conclusively that our original so-called amæna, neglecta, and: to an 
extent our squalens groups, were all developped from pallida and 
variegata crosses. This, naturally, would not apply to the more 
