BOTANICAL SUBJECTS. 



273 



as seen in Fig 



113. If we c«// the fruit head of Lardizabala a 

 receptacle and the ovary (a) a concei^tacle, we shall have 

 essentially the same thing. 



Fig. 113. Receptacle of Cystoseira barbata on which are cliisterad the 

 conceptacles ("Harv. Phyc. Brit.," pi. 360). 



POLYEMBRY. 



Penzig (" Studj sugli Agrumi ") has counted as many as forty 

 embryos in one Citrus seed, so that it was rather a raceme of 

 embryos. It is well known that from one seed of Citrus several 

 plantlets often germinate. 



Now, how can we tell whether all these embryos have been 

 pollinated ? The chances are that many would remain as simple 

 buds (parthenogenetic embryos). There is a possibility, at all 

 events, that some might be pollinated and some not, and a certain 

 number of both kinds might develop. This would explain why 

 some seedlings repeat so frequently the type of this female parent, 

 as buds do, while others vary, being a mixture of male and female 

 elements. The stimulus of pollination in some might start other 

 embryos into parthenogenetic growth. 



In the Khasia Hills of Eastern Bengal, where the Suntara 

 orange is largely grown solely from seed, there would appear to be 

 a fine field for some interesting observations in this direction. It 

 A p. 1724. s 



