446 
Journal of Agricultural Research 
Vol. XXVIII, No. 5 
plants were making little or no progress toward flowering, the small tassels in 
some instances atrophying accompanied by a change toward vegetative growth 
in the nearest leaf axils. 
Only four plants blossomed prior to September 15, while more than a thousand 
opened their first flowers between September 15 and October 15, mainly in the 
last 10 days of September and the first 10 days of October. In rows No. 1 to 
10, inclusive, which were planted between December 21, 1921, and April 26, 
1922, 99 per cent of the plants were in blossom by the end of October. Eighty- 
eight per cent of the plants were in blossom in rows No. 11, 71 per cent in rows 
No. 12, and 19 per cent in rows No. 13. Rows No. 14, which were planted 
June 21, 1922, and all later plantings, failed to blossom (PI. 1, A and B). The 
height of the plants in the various rows at this time is graphically shown in 
figure 2, the plants in rows No. 1 to 13, inclusive, ranging from less than 3 to 
more than 8 feet in height. 
Toward the close of October, comparatively few blossoms opened, and the 
plants bore numerous pods. Only 1 or 2 per cent of the plants bore blossoms 
from early November until the middle of January, at which time 3 or 4 per cent 
OAM P£3. MAP.APP. MAY JVA/E JVLY A VO. SEPT. OCT. /SOY. D£C. 
flowered. Only three plants in the entire field blossomed in February. With 
the exception of one of these, all the plants blossoming in the winter had come 
into blossom in the autumn and continued to open a few scattered flowers now 
and then instead of setting heavy panicles of bloom. The only plant bearing 
flowers in March was one of the three which was seen with blossoms in February. 
The April record showed one, and the May record, two plants in blossom. 
Although only two plants were in flower June 20, 1923, many produced the 
tassel-like terminal tip of the young inflorescence. The tips later failed in most 
instances to produce flowers, and the plants resumed vegetative growth. 
Plate 2, A, shows an atrophied inflorescence in the center of a representative 
specimen at the right, with vegetative growth well developed in the nearest leaf 
axils, and a number of shoots in varying stages (August 1, 1923). These shoots 
at first appeared as young inflorescence, but later instead of developing the 
terminal raceme or panicle of flowers, produced a stem of numerous short inter¬ 
nodes wholly different from normal vegetative growth, followed or topped by 
normal growth of the stem and leaves (PI. 2, B). By the end of August, 
about 6 per cent of the plants bore either flowers, or pods resulting from recent 
flowering, and about 54 per cent had budded. 
