BOTANICAL GAZETTE. . 349 
The Process of Fertilization in Campanula Americana L,’ 
BY CHARLES R. BARNES. hy 
(WITH PLATE X.) 
I have undertaken to investigate some of the more recondite 
facts in the process of fertilization of Campanula Americana in 
order to increase the number of dicotyledons that have been so 
studied and to bring to light any peculiar adaptations which 
might exist, 
The investigation of dicotyledonous plants is much more dif- 
ficult than that of monocotyledons, because the transparence of 
the ovules and the usually large size of the nuclei which are so 
common among the latter seldom coexist in any dicot. Cam- 
bud. The style at this time is not as long as the anthers, and 
that part in Sentai with the bursted sii is thickly clothed 
with stiff hairs pointing upward (fig. 1). The rapid growth of 
the style pushes these hairs, like the pristles of a bottle brush, 
through the thecse and clears them of all the pollen, 
heres to the style of the now open flower (fig- 2). Att 
the three lobes of the stigma are not manifest. They do not 
part of the body, 
or the legs, in contact with the 
stigmatic sur- 
undance by a 
most commonly the hairy thorax 
Pollen-laden styles of jatel yaoipenred flowers or the 
n 
ere isin these plants hardly a possibility of 
: Pilea being always brushed or blown off th 
'gmas are at all exposed. 
t of Science, August 1885. 
1Read m 
befo F sat dyancement 
2 re the American Association for the Adva 
LCE. Gray, Struct. Bot. p. 222, on proterandry of .C. rapunculoides 
