200 



Davis. 



The plants were appareuth- completely sterile when sei fed and also 

 sterile when reciprocally crossed. My data on this matter is as follows: — 

 plant 12'12g-a, 26 times selfed, 29 times pollinated by 12'13ga; plant 

 12"12ma, 31 times selfed, 19 times pollinated by 12-13ga; plant 12-13g:a, 



r»i^».«si '^tj'VJii'^ 



X"m.K,ri.ca.toL 



Fig. 21. Infliiresceiife of livlirid, 12'12f;a, f/igas >^ «iwr/raia "W., resembling 



more closely tlie gigas parent luit with clear evidence of muricaUi influence. 



At tlie riglit is a leaf from the base of the main stem. 



24 times selfed, lit times |i(illiii;ite(l liy 12'12ga, plant 12'13ma, 5 times 

 selfed, 7 times pollinated by 12'12f>a. These hand pollinated flowers, 

 160 in all, failed to develop a single ca))sule, the ovaiies shriveling and 

 falling off. These plants, iiowever. as well as all others in the culture 



