128 Trans. Acad. Sci. of St. Louis. 



are usually borne. Sometimes, however, the two kinds 

 of flowers occupy adjoining axils on the same twig. 

 Occasionally the staminate flowers are found on vigorous 

 twigs, particularly if pistillate flowers are entirely ab- 

 sent on shoots of a given branch. On "Taber's No. 

 129," the staminate flowers sometimes occupy the ter- 

 minal shoots, and the pistillate, the lateral ones, espe- 

 cially if they are equally or nearly equally vigorous. The 

 rule, however, is as already stated. The few staminate 

 flowers so far found on "Okame" were all on short 

 lateral twigs, and the same is true of the many flowers 

 found on "Slang" (No. 21910). On "Masugata," 

 "Taber's No. 129" and the Eagle Lake tree they are 

 more frequently to be found on the vigorous twigs to 

 which reference is made above. 



Perfect flowers are usually associated with the stami- 

 nate ones. Up to this time, they have not been discov- 

 ered on any varieties of the fixed pistillate flowering 

 type. In other words, it appears that the perfect 

 flowers are a development from the staminate form and 

 not from the pistillate form. When present, they are 

 found more usually near the base of the strong and vig- 

 orous twigs which occasionally bear staminate flowers 

 than on the short and comparatively weak lateral twigs 

 on which the staminate flowers are generally found. 

 Their development from the staminate form appears 

 to be connected with the food supply. 



Staminate Floweks. 

 Sometimes staminate flowers are produced in great 

 profusion. They are borne normally in 3-flowered cymes 

 in the axils of the bract-like leaves and normal leaves 

 at the base of the twigs. Sometimes they appear at the 

 very base of the twigs from flower buds located beneath 

 the persistent scales of the last year's growth and occa- 

 sionally on many flowered branches they are produced 

 from last season's buds without apparent branch forma- 

 tion. Occasionally the cymes are four-flowered, some- 



