PLATE 2 
A. Crazy-top in Pima cotton, showing the characteristic appearance at the 
end of the season, the plants sterile below but with an excessive top-growth of 
stiff erect branches, with numerous buds and small bolls, at the end of the 
season. To compare with PI. 2 B. 
B. The same plants as in PI. 2 A, with the leaves removed, showing more 
clearly the characteristic ascending branches of the upper part of the plant, and 
the nearly complete absence of mature bolls on the lower fruiting branches. 
Photographed by Robert D. Martin. Sacaton, Ariz., September, 1923. 
