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VOLUME XXV__ ‘ NUMBER 2 
PeeANICAL. GAZETTE 
FEBRUARY 1898 
CONTRIBUTION TO THE LIFE-HISTORY OF RANUN- 
CULUS; 
JoHN M. CouLTeER. 
(WITH PLATES IV—VI!) 
Ix 1896 a group of research students working in the Hull © 
Botanical Laboratory of the University of Chicago began the 
investigation of a somewhat wide range of spermatophytes. In 
addition to the individual problems certain representative 
forms were selected for joint study, among which was Ranunculus. 
It dice felt that a large multiplication of preparations was desira- 
“ i at least a few cases, to discover the possibilities in varia- 
ne this feeling was justified by the result, since very differ- 
ey ae maid. be drawn from different sets of prepara- 
a : 1S comparatively easy to obtain a definite sequence in 
co cement of structures when the facts are few, but defi- 
eal seem to disappear as facts multiply. 
alis : si gia of Ranunculus chiefly studied were R. septentrion- 
= = cee and R. abortivus, and the results obtained 
ih Sec <a that it would not be profitable to distinguish 
tain sie S€ among the species in the following account. * Cer- 
contributes, a a Ranunculacee. were examined also, and they’ 
© certain conclusions herein set forth. 
bnaen yom ab 7 cna Botanical Laboratory. VII. The previous contri- 
73 
