Decussate leaves of the Scarlet Pim- 

 pernel {Anagallis arvensis), with 

 axillary flowers, p. 120. 



Alnus gltitinosa. p. 135 



Mercurialis perennis'. a, Staminate flower ; b, Pistillate flower, p. 130. 



{Betzueen pp. 1.20 and \2i. 



