Chap. IV. HIBISCUS AFRICANUS. 141 



The four crossed plants average 13 "25, and the focr self-ler- 

 tilised 14*43 inches in height; or as 100 to 109. Here we have 

 the unusual case of self-fertilised plants exceeding the crossed 

 in height ; but only four pairs were measured, and these did not 

 grow well or equally. I did not compare the fertility of the two 

 lots. 



