Fic. 57.—Sweet Potato. Flower-clusters coming from _leaf-axils, 3. 
Flower, cut vertically; natural size. Fruit, t. Seed, cut_in_ half 
vertically to show the folded germ in seed-food (dotted), #. (Original.) 
. 58, I.— White 
Potato (Solanum 
tuberosum, Night- 
shade Family, So- 
lanacee). Base of 
plant growing 
fromanoldtuber 
and producing Az 
new tubers at the w= 
tip of under- 
ground branches 
of the stem. 
(Baillon.)— Plant 
a perennial con- 
tinued from year 
to year by its tu- 
bers; stem erect, 
about 0.7 m. tall; 
leaves dull green, 
hairy; flowers lilac 
or white; fruit 
fleshy, green. 
