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VOLUME XXVII : , NUMBER 3 
MMOTANICAL (;AZETTE 
MARCH 1899 
NOTES ON THE STRUCTURE OF THE EMBRYO-SAC IN 
SPARGANIUM AND LYSICHITON. 
DouGLas HouGHTON CAMPBELL. 
(WITH PLATE 1) 
Recent studies on the structure of the embryo-sac of the 
2 ae have made it very evident that more variation 
” was formerly supposed. All forms as yet examined 
son sigs essential characters of the earlier stages of the embryo- 
eae a ater Stages show much variation, especially in the 
ian behavior of the antipodal cells. Other marked 
these are “ae os type structure have been recorded, but as yet 
Preting 7. and fragmentary to be of much value in inter- 
hese disc pPlogies of the structures of the embryo-sac. 
study be eae however, render it important that a careful 
ing more oe of the simpler types of angiosperms, as it is ae 
tive types a more evident that it is among these that the primi- 
the origin a. “3 sought, and here, if anywhere, the clues to 
The writer x angiosperms are likely to be discovered. 
the simpler a as been for some time engaged upon a study of 
some light y Snocotyledons in the hope of being able to throw 
Tom being a eis affinities, which at present are very far 
Siven to th carly understood. Especial attention has been . 
© study of the embryo-sac and embryo. Some of the 
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