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Oregon Bulb Farms, Inc. 
Dutch Iris —De Graaff Hybrids. 
This very distinctive group is of recent origin and has in a few years won inter¬ 
national recognition. The flowers are not only superior in substance, brilliancy and 
purity of color, but also earlier, larger and of greater refinement than the old Dutch 
and Spanish Iris. The new Hybrids we offer are readily distinguished by the narrow 
orange stripe on the falls, while the older varieties have a larger yellow blotch. 
These iris are unsurpassed as cut flowers, since they will stand any amount of 
handling and traveling, while their earliness and good forcing habits make them 
valuable for the commercial grower and florist. 
Their hardiness and large color range have made them very popular for garden 
purposes, and, though in extreme climates they need some protection, they seem to 
do quite well as far north as New York. The varieties we list have been carefully 
selected to give the full range of colors and we have large stocks of the varieties that 
have proven most profitable in the English and European flower markets. We also 
have a complete collection of the latest novelties, which show great improvements. 
We sent a trial collection of our bulbous irises to Mr. Chas. Gersdorff, well-known 
Iris breeder of Washington, D. C. He writes us: “I consider the reticulata, Dutch 
improved hybrids, new Spanish hybrids and Tingitana hybrid irises as ideal for 
garden use and for cutting for any amateur flower grower, for their ease of culture, 
hardiness and wonderfully beautiful long-keeping flowers. In my garden they bloomed 
from late February to late May.” 
Relative Flowering Dates of Bulbous Irises. 
1 The First 
Wedgewood 
A. Bloemaard 
J. Victors 
2 Adrian Backer 
Theo Wyck 
3 Jan Nagel 
Jan Weenix 
Poggenbeeck 
White Excelsior 
Yellow Queen 
4 Jacob de Wit 
J. W. de Wilde 
Leonardo da Vinci 
Willem Zuiderveld 
5 D. Haring 
S. van Ruysdael 
Therese Schwartze 
6 Gerrit van Hees 
S. de Vlieger 
Willem Verschuur 
7 Imperator 
8 Golden Glory 
9 Golden Bronze 
10 Golden Lion 
Golden Wonder 
In normal seasons there is a three-day interval between each group, figured from 
the date the majority of the flowers are fully open. 
