. Bulletin. 16 BULLETIN 28, U. S. DEPARTMENT OF AGRICULTURE. secured from a grower in one of the Eastern States and tested at Bellingham. Figure 14 graphically shows the results of the test. The flowers from bulbs grown at the garden for three seasons were practically perfect and compared favorably with those from im- ported bulbs. Mr. John W. Macrae Smith and possibly others se- cured similar results with this variety in their early experiments in bulb growing near Fig. 15.—American-grown and Holland-grown tulips in alternate rows on the trial grounds of the United States Departm
. Bulletin. 16 BULLETIN 28, U. S. DEPARTMENT OF AGRICULTURE. secured from a grower in one of the Eastern States and tested at Bellingham. Figure 14 graphically shows the results of the test. The flowers from bulbs grown at the garden for three seasons were practically perfect and compared favorably with those from im- ported bulbs. Mr. John W. Macrae Smith and possibly others se- cured similar results with this variety in their early experiments in bulb growing near Fig. 15.—American-grown and Holland-grown tulips in alternate rows on the trial grounds of the United States Department of Agriculture. Beginning on the left, rows 1, Kcizerskroon, :!, Pottebakkcr White, and 5, Proserpine, are from imported bulbs. Rows 2, Keizerskroon, 4, Pottebakker White, 6, Proserpine, are from Bellingham-grown bulbs. The bulbs from both sources were ordinary commercial stock. Photographed April 20, 1911. PROPAGATION. The narcissus is propagated by seeds when it is desired to secure new varieties. The commercial method of propagation of the nar- cissus, however, is by offsets. The increase secured at the garden varies, according to the variety, from 99 to 380 per cent, and the time required to grow commercial bulbs from slabs is from three to five years, depending upon the variety, the size and vigor of the offsets, and the conditions under which they are Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Office of Experiment Stations. Washington, Govt. Print. Off
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