158 Explanation of the Plates. 



Fio. 



112. Longitudinal section of lowest part of flower of Dwphne 



Blagayana Freyer., x 12. 



113. Inflorescence of Dianthus prolifer L., x Ij. The tough 



membranous bracts closely invest 5-7 crowded flowers, 

 which, one after another, protrude their petals, stamens, 

 and styles beyond the bracts, each opening and closing 

 twice. Each flower occupies two days in blossoming. 

 After this the paorts of the flower which are above the 

 bracts shrivel up, and another flower protrudes its petals, 

 stamens, and style. 



114. A single flower of an inflorescence of Dianthus prolifer on its 



first day of blossoming, x 14. 



115. Flower of Silene nutans L. as seen at midnight, natural size. 



116. The same flower of Silene nuta/ns L. the following- midday, 



natural size. 



117. Stipule of Iw/patiens tricomis WaUich., transformed into a 



nectary, seen from below. On the most convex part is a 

 drop of nectar ; to the right of the nectary is the petiole ; 

 and behind the nectary is seen the forked peduncle, 

 springing from the axil of the leaf ; x 10. 



118. Section of the stipule of Impatiens tricornis Wallich., having 



the function of a nectary, x 10. 



