788 PROFESSOR BALFOUR ON THE IPECAC CTAN PLANT. 



Figure 10. Fruit of one of the Rio Janeiro plants, of the natural size ; four in a cluster. The plant has 

 dimorphic forms of flowers. It was artificially fertilised. The fruit is large, slightly narrowed 

 towards the apex, shining, and of a deep violet purple. The succulent portion is insipid. 



Figure 11. One of the fruits magnified about twice the natural size, showing external epicarp, which is 

 coloured ; mesocarp within, colourless ; and two pale hard nucules, corresponding to divisions 

 of the endocarp, each of which contains one hard seed. 



Figure 1 2. One of the nucules removed, showing its fiattish inner surface, with a ridge in its centre. 



Figure 13. Seed shown separately, with its fiat surface having a groove in its centre. It consists of 

 hard horny albumen and a minute embryo. 



Figure 14. Pollen grains, highly magnified, of a somewhat irregular rounded form. 



Figure 15. Section of albumen of the seed, showing thick-walled cells, with starch grains. 



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