Bui. 1082, U. S. Dept. of Agriculture. 
PLATE XV! M 
/ ./ 
, 
u 
i 
? 
'M 
Proserpine and Keizerkroon Tulip Bulbs. 
Fig. 1.— Four clumps of Proserpine dug from 8 to 9 centimeter bulbs set 14 to the row. All 
flowered, but all did not propagate. Fig. 2.— The same bulbs shown in Figure 1, cleaned and 
separated. The variety reproduces poorly, which is the main reason for its comparatively high 
price. Fig. 3.— Reproduction in Keizerkroon from 10 to 12 centimeter bulbs planted 14 to the 
row. The bulbs were imported in the autumn of 1918 and used for bedding. They were dug as 
soon as the flowers had faded, heeled in to ripen, and were dug again early in June, 1919. The 
results are for the 1920 crop when the bulbs had become normal, bul probably had not repro- 
duced as well as they would have done had they ripened properly the previous year. Fig. 4. — 
Reproduction in Keizerkroon S-ccntimeter normal bulbs which have been in' the country 10 
years. This popular variety is not prolific of increase. 
