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FERTILISATION AND 

 CROSS-FERTILISATION OF THE HOP. 



BY ALBERT HOWARD, M.A., F.L.S. 



(Botanist to the South-Eastern Agricultural College, Wye, Kent}. 



SPECIALLY CONTRIBUTED. 



I. THE INFLUENCE OF FERTILISATION ON THE DEVELOPMENT OF 



THE HOP. 



T N general the hop is dioecious, i.e., the male and female flowers 

 are borne on different plants. Sometimes, however, in gardens 

 of the Bramling variety, hills are met with from which bines arise 

 bearing both male and female flowers. Such monoecious plants are 

 rare. 



The Male Flowers. The inflorescences bearing the male flowers 

 are much branched cymose panicles, arising either from the axils of 

 the main stem or from the axils of the lateral shoots. 



Each flower is about a quarter of an inch in diameter, and 

 consists of a five-leaved sepaloid perianth, opposite which are five 

 stamens with short filaments and long anthers, which liberate their 

 pollen by longitudinal dehiscence (i, 2, 3, Frontispiece).* 



* The illustrations in this article appeared in a recent BULLETIN issued by the 

 South-EasUrn Agricultural College, Wye, to whom we are indebted for permission to 

 reproduce. 



C 



