Produclion of Fruits and Seeds in Certain Plants. loi 



fruit-clusters of thirteen plants were examined. A perfect fruit 

 is one fully matured and fleshy, an abortive fruit is an imper- 

 fect, shriveled and seedless one. 



Rliododcndron {Azalea) nndifloruni, Torr. (Pinxter-Flower). 

 — The whole bush was examined in the enumeration of perfect 

 and abortive fruits. The two plants were quite small although 

 fully formed. 



Cormisflorida, L. (Flowering Dogwood). — Professor Sargent 

 in his Silva (V, 67) says regarding the fruit of this plant: 

 " The fruit ripens in October, usually only three or four 

 drupes being developed from a head of flowers." In the table 

 below, details are given for tv/o trees ; the first tree having 

 34 clusters of fruits and the second one 102 clusters, originally ; 

 each of the flower clusters from which the fruits came had 

 four white attractive bracts. 



