BRIEPER ARTICLES. 
NOTES ON THE FERTILIZATION AND EMBRYOGENY OF 
CONIFERS. 
(WITH PLATE VI) 
DurRinG the autumn quarter of 1896 a group of graduate students 
under my direction made a study of the special morphology of gym- 
nosperms. The necessities of the material restricted critical work to 
the conifers, and among them Pinus and Taxus were represented by 
the most complete series of stages. The problems of special interest 
were those of fertilization and embryogeny, following such papers as 
those of Belajeff, Dixon, and others. The work was supplementary to 
the regular research work among angiosperms in which each student is 
engaged, and preparations made for classes in elementary morphology 
were freely used. Asa consequence, the material was sometimes in 
such a condition of staining, etc., that some points of critical interest 
could not be cleared up by proper technique. The work of the 
authors referred to was largely confirmed in the minutest details, but 
in looking over the results of the quarter it ‘occurred to me that 
enough additional observations had been made to justify this some- 
| what | informal record. 
series of well made preparations by seven or eight trained observers _ 
as did not pong * something noteworthy, anaes ina be. so little 
wink 
i cami 3 
It would be strange if the examination of large 
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