252 BOTANICAL GAZETTE [ocroBEr 
water; but the others produced abundant roots there and also at 
theflower end (jig. 5). Finally, from one of the former the root 
system was removed by severing the stem at the base, and vigorous 
roots then appeared in the cylinder, as well as on the lower end of 
the stem. 
The influence exerted by the roots 
very evidently passes along the vascular 
bundles, for the transverse cutting of 
these at any place leads to the origin of 
roots just above the cut. The cutting 
of the cortex as deep as the bundles has 
no results. If a notch be cut in the 
ie 
Fic. 4.—Phaseolus:—A short 
glass tube attached around stem 
and filled with water. Roots, 
/ 
grown in water culture, left removed; 
uninjured and submerged. No Fic 5.—Phaseolus: Entire root gate in tube 
roots formed on stem within otherwise as in fig. 4. Roots develop 
tube. and in water at base of stem. 
nly above, 
stem so as to sever some of the bundles, roots appear © 
not below the notch (fig. 6). If the stem is cut off near sii 
roots come at this place; but if it be cut off further up; a 
come there even more vigorously. If a series of notches, either 
