4 BULLETIN 176^ U. S. DEPARTMENT OF AGEICULTUEE. 



to result from such a study and should tend to discourage the pres- 

 ent practice of some of the seedsmen who manufacture new varieties 

 out of old ones. 



CLASSIFICATION KEY.i 



Group 1. — Cobbler. 



Tubers: Roundish; skin creamy white. 



Sprouts: Base, leaf scales, and tips slightly or distinctly tinged with reddish 



violet or magenta. In many cases the color is absent. 

 Flowers: Light rose-purple; under intense heat may be almost white. 

 Group 2. — Triumph. 



Tubers: Roundish; skin creamy white, with more or less numerous splashes of 



red, or carmine, or solid red; maturing very early. 

 Sprouts: Base, leaf scales, and tips more or less deeply suffused with reddish 



violet. 

 Flowers: Very light rose-purple. 

 Group 3. — Early Michigan. 



Tubers: Oblong or elongate-flattened; skin white or creamy white, occasionally 



suffused with pink around bud-eye cluster in Early Albino. 

 Sprouts: Base light rose-purple; tips creamy white or light rose-purple. 

 Flowers: White. 

 Group 4. — Rose. 



Tubers: Roundish oblong to elongate-flattened or spindle-shape flattened; skin 



flesh colored or pink, or (in the case of the White Rose) white. 

 Sprouts: Base and internodes creamy white to deep rose-lilac; leaf scales and 



tips cream to rose-lilac. 

 Flowers: White in sections 1 and 2; rose-lilac in section 3. 

 Group 5. — Early Ohio. 



Tubers: Round, oblong, or ovoid; skin flesh colored or light pink, with numerous 



small, raised, russet dots. 

 Sprouts: Base, leaf scales, and tips more or less deeply suffused with carmine- 

 lilac to violet-lilac or magenta. 

 Flowers: White. 

 Group 6. — Hebron. 



Tubers: Elongated, somewhat flattened, sometimes spindle shaped; skin creamy 



white, more or less clouded \vith flesh color or light pink. 

 Sprouts: Base creamy white to light lilac; leaf scales and tips pure mauve to 



magenta, but color sometimes absent. 

 Flowers: White. 



Group 7. — BURBANK. 



Tubers: Long, cylindrical to somewhat flattened, inclined to be slightly spindle 



shaped; skin white to light creamy white, smooth and glistening, or deep 



russet in the case of section 2. 

 Sprouts: Base creamy white or faintly tinged with magenta; leaf scales and tips 



usually lightly tinged with magenta. 

 Flowers: White. ^ 



Group 8. — Green Mountain. 



Tubers: Moderately to distinctly oblong, usually broad, flattened; skin a dull 



creamy or light russet color, frequently having russet-brown splashes toward 



the seed end. 

 Sprouts: Section 1 — base, leaf scales, and tips creamy white; section 2 — base 



usually white, occasionally tinged with magenta; leaf scales and tips tinged ' 



with lilac to magenta. 

 Flowers: White. 



1 The color values are based upon the chart published by the French Chrysanthemum Society, Paris, 

 1905. 



