522 ALFALFA FARMING IN AMERICA. 
purple-flowering variety. In appearance it is much 
like the Grimm, excepting that the crowns seem to 
grow larger, some of them growing as large as 15 
inches in diameter. Like the Grimm, it is perfectly 
hardy and the crown is partly or wholly submerged. 
The flowers range in color from the pure yellow to 
purple, with all shades in between. From our tests 
up-to-date it would seem that the Cossack is some- 
what superior in yield to the Grimm, although con- 
elusive tests have not been made as yet. 
Cherno.—This variety so closely resembles the 
Cossack that it is doubtful whether they really are 
distinct varieties or not. 
Orenberg.—Possibly this is the most sensational 
in some of its characteristics of all the Siberian 
alfalfas. It has a large crown, with no tap-root at 
all, but with a large number of small roots which 
branch out in all directions, some of them running 
out horizontally at a depth of about 8 inches, send- 
ing up new plants from time to time. Mr. Haas in 
North Dakota, who has probably had more experi- 
ence in growing these new varieties than any other 
man in this country, reports that on a four-year-old 
Orenberg plant baby plants were found growing as 
far away as 15 feet from the mother plant. The 
crowns are found about 4 inches below the surface 
of the ground and winterkilling is hence next to an 
impossibility with this variety. It is not believed 
that the Orenberg can be cut for hay more than 
twice in a season in the cornbelt, although present 
