VOLUME XXVI NUMBER 5 
BOTANICAL GAZE EEE 
NOVEMBER 1898 
THE COMPARATIVE MORPHOLOGY OF THE PISTILS 
OF THE RANUNCULACEA, ALISMACE&, AND 
ROSACEA: 
ERNST A. BESSEY. 
(WITH PLATE XxXV) 
RANUNCULACE. 
THERE are two types of pistil present in this family. In the 
first there is but a single ovule in each pistil; in a specialized 
form of this type there are, besides the one principal ovule, two 
to six rudimentary ovules subsequently developed, but never 
_ Teaching maturity. The second type consists of those pistils 
which have two to many ovules, all or nearly all reaching matu- 
tity. Pistils of the first type are found in the Ranunculez, 
Anemonee, and Clematidez, and of the second type in the Hel- 
leboree and Paconiex. 
The species studied to determine the mode of development 
of the pistils were the following: Ranunculus abortivus L., R. 
eremogenes Greene, R. delphinifolius Torr., R. ovalis Raf., R. glaber- 
rimus ? Hook., and Myosurus minimus L., all representing the 
Strictly uniovulate type; and Anemone Caroliniana Walt., ie cyl- 
indrica Gray, A. Canadensis L., Pulsatilla hirsutissima (Pursh) 
Britt., and Clematis ligusticifolia Nutt., representing the uniovulate 
type where rudimentary ovules are developed. For the study 
*A thesis for the degree of Master of Arts, in The University of Nebraska, 1898. 
