10 BULLETIN 176, U. S. DEPARTMENT OF AGRICULTURE. 
8.—GREEN MOUNTAIN GROUP. 
The members of the Green Mountain group may be said to share 
honors with those of the Rural in their commercial importance. 
They seem to be particularly well adapted to northern: latitudes 
where the rainfall is abundant and the temperature is not excessively 
high. Asarule, they do not succeed as well in localities where they are 
subjected to unfavorable conditions of growth during the time they 
are forming tubers as do the members of the Rural group. The 
varieties in this group are divided into two sections, according to 
whether they have white or slightly colored sprouts. 
Description.—Vines large, strong, healthy, and well branched. Stems nearly 
upright in early stages of growth, but gradually assuming a spreading habit toward the 
latter end of the season. Flowers white, abundant, rarely producing seed balls 
except under very favorable climatic and soil conditions. Tubers broadly roundish 
flattened to distinctly oblong-flattened; ends usually blunt, especially the seed end 
(Pls. XIV and XV). Eyes medium in number, rather shallow, with strong bud-eye 
cluster. Skin dull creamy white, more or less netted, frequently with russet-colored 
splashes toward the seed end. Sprouts rather short and stubby. In section 1 they 
are white. Those in section 2, with the exception of Twentieth Century and Late 
Puritan, are mostly without color at the base, while the leaf scales and tips are usually 
faintly or distinctly tinged with lilac or magenta. 
The following varieties are believed to belong to the white-sprout 
division, section 1: 
Bethel Beauty Gurney’s White Harvest (Pl. XV). 
Blightless Wonder. Keystone. 
Carman No. 1. Late Blightless. 
Clyde. Long Island Wonder. 
Delaware. Norcross. 
Empire State. Pride. 
Farmer. Snow. 
Freeman. State of Maine. 
Gold Coin (Pl. XV). Uncle Sam. 
Green Mountain (Pl. XIV). White Mountain. 
Green Mountain, Jr. 
The colored-sprout division, listed as section 2, consists of the 
Charles Downing, Idaho Rural, and Rustproof varieties. 
9.—RURAL GROUP. 
The Rural group includes a large number of strong-growing, late- 
maturing varieties. Collectively they are now commonly referred 
to by New York State growers as ‘‘blue-sprout’”’ potatoes. This 
term distinguishes them from the ‘“‘ white-sprout”’ varieties belonging 
to the Green Mountain group. The varieties of the Rural group seem 
to be admirably adapted to northern and western New York and to 
certain sections of Michigan and Wisconsin, and they can also be 
successfully grown in the New England States. The tubers keep well 
in storage and are slow to germinate in the spring. The vines 
develop slowly at first, but as the season advances they branch rather 
