Sein 
Rs 
E E 
1883.] The Hibernacula of Herbs. III 
formed in the autumn. The specimens examined in the beginning 
of February had already commenced growing in spite of the 
frozen condition of the soil. The only way of insuring the con- 
dition of a hibernaculum before 
growth is to collect the herb in 
October or November. 
The winter buds of Dicentra 
cucullaria DC., are surrounded 
by the enlarged bases of last 
year’s petioles and by numerous 
small granules disposed on 
branches which often terminate 
ina leafbud. This would indi- 
cate that the granules are also 
bases of petioles which were ar- 
rested in their development early 
in life and specialized for the pur- 
4.—Sanguinaria canadensis; aâ, 
Be : FIG. 4. j 
pose of r etaining the food which hibernaculum ; 4, ¢, d, leaves enwrapping 
shall permit the plant to grow flower bud after removal of the scales 
while the soil is still frozen. The hibernaculum contains the 
entire plant in a high state of development, forming a pretty sight 
even at this stage of growth. 
À 
Fic, 5.—Dicentra cucullaria ; a, tuberiferous bulb with hibernaculum (scaly 
s 
Ed > 
bud); 6, ¢, d, two leaves and raceme of flower buds after removal of the scales 
Earlier in this paper the formation of monopodial stems was 
described, In conclusion it may be well to note the formation of 
its Opposite, the sympodial stem, or sympodium. 
In certain plants, after the stem is of sufficient age to produce 
flowers, this office is undertaken by the terminal bud, which de- 
velops into an aerial stem for this purpose. When autumn 
arrives this decays, and it is evident that the continuance of 
Srowth must depend upon the development of the axillary buds. 
ext season these buds flower and their terminal parts are also 
