WO VEYPHS OH RPROLIBRRATION IN ALKALHA. 9 
fact, new aerial shoots reach a considerable degree of development 
before roots of any importance are sent out from the swellings. 
There appears to be quite a difference in the plants that arise from 
Fig. 2.—A plant of Medicago falcata (S. P. I. No. 28071) found at Highmore, 8. Dak., 
May, 1912. The root proliferation is remarkably developed in this plant. 
the proliferous roots with respect to root development; some develop 
a crown and root system of their own at an early date, while others 
rely for an indefinite period on the proliferating roots for their 
& 
Fic. 5.—Sections of proliferating roots of alfalfa, showing swellings upon which the buds 
that develop new plants appear. The buds are also sometimes produced from other por- 
tions of these roots, but so far no shoots have been observed to arise from thein. 
support. (See figs. 4, 5, 6, and 7.) This point, however, needs a 
more thorough investigation, as the number of cases thus far found is 
insufficient for definite conclusions. 
79505°— Cir. 115—13 2 
