86 GENERAL BIOLOGY. 



upper third is slender and five-cleft at the 

 top (stigmas). The ovary is deeply lobed. 

 Sketch. 

 Make a transverse section through the ovary. 



How many chambers has the ovary? Where 



are the ovules attached ? Sketch. 

 VI. Make a diagrammatic sketch of the flower in 

 longitudinal section, showing the relative 

 position of all its parts. 

 Make a diagram of the transverse section of the 



flower. 



In like manner examine, sketch, and make 

 diagrams of the violet, of a papilionaceous 

 flower, and of a flower of the lily or of the 

 amaryllis family, following in each case 

 the order observed for the geranium, and 

 noting the differences. 



For description of irregular parts, etc., the 

 student is referred to Gray's " Manual of 

 Botany," under Violacese, Leguminosse, 

 Liliacese, Amaryllidacese ; and to Miiller, 

 "The Fertilization of Flowers," under Vio- 

 lariese, Leguminosse, Liliacese, and Ama- 

 ryllidese. 



GERMINATION OF POLLEN-GRAINS. 



Mount pollen-grains of narcissus or of daffo- 

 dil in a 5 per cent, solution of cane-sugar in 



