VI. EXPERIMENTAL OBSERVATION OF THE 
ORIGIN OF VARIETIES. 
18. THE ORIGIN OF CHRYSANTHEMUM SEGETUM. 
PLENUM. 
(See Plate II.) 
The double corn marigold constitutes a new variety 
which has recently arisen in my cultures. It has never 
occurred before. Chrysanthemum scgctmn is, of course, 
a favorite annual garden plant, and so is a variety of it 
called C. scgctiun grandiflorum. A form called C. scge- 
tiHn Gloria is announced amongst this year's novelties i 1 
its flowers are said to attain a diameter of 10 centimeters, 
but it is not double. If a double form ever had appeared, 
it would without any doubt have been put on the market 
as a noteworthy improvement, even as the double vari- 
eties of Chrysanthemum inodonun and other composites 
are so widely grown. 
My "conquest," as the breeders of hyacinths in Haar- 
lem call their novelties, is the counterpart of the well- 
known Chrysanthemum inodonun plcnissinnun. It is 
inferior to it in the matter of color, inasmuch as white 
flowers are always in greater favor than yellow ones. 
The doubling of the heads of composites is never so 
perfect that tubular florets are completely absent from 
all inflorescences. Nevertheless it frequently looks as if 
this were so (Fig. 28) ; but if we look a little closer we 
1 Seed-catalogue of HAAGE and SCHMIDT in Erfurt, 1900. 
