VOLUME LIIl NUMBER 3 
Ere 
BOTANICAL GAZE 
MARCH 1912 
THE MORPHOLOGY OF LEITNERIA FLORIDANA 
CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY 154 
| WANDA M. PFEIFFER 
(WITH PLATES XVIII-XX) 
Former investigators examining Leiineria have come to such 
different conclusions as to its proper place among Archichlamydeae 
that it seemed worth while to look into its morphology in the 
hope that some interesting situations might be uncovered. 
Material and methods 
The material used was obtained from plants in the Missouri 
Botanical Garden of St. Louis. The first material was collected 
during the winter and spring of 1908, and was killed in a dilute 
solution of chromo-acetic acid by Miss Laura D. WATKINS, who 
sent it to the laboratory in 70 per cent alcohol. I spent the last 
week in March 1908 in St. Louis: Pollen of Leitneria was begin- 
ning to be shed on March 28, which gave me an opportunity to 
pollinate some of the flowers of pistillate plants which stood a con- 
siderable distance from any staminate ones. During this week 
I made frequent collections in the hope of obtaining fertilization 
Stages. 
In the next year, living material was sent to me about twice 
a week from early in January until late in July. I again spent the 
week when pollen was ripe in St. Louis, and pollinated practically 
all the pistillate catkins in the garden except those which grew 
on seven twigs which were covered with paper sacks in order to 
189 
