NATURAL HISTORY OF PLANTS. 



bears five alternipetaloiis glands. The gyna3ceum is free, superior, 

 formed of an ovary -witli five cells, superposed to tlie petals, sur- 

 mounted by a style wbich above separates into five branches stig- 

 matiferous within. In the internal angle of each cell there is a 

 longitudinal placenta supporting two ovules. These arc collateral 



Geranium sanguineum. 



Fig. 8. Flower. 



10. Long- i^cct. of flowers {\). 



Fig. 11. Fruit {\). 



or almost superposed, descendcnt, anatropous with micropylc directed 

 outwards and upwards.^ The fruit, generally accompanied at its base 

 by the persistent calyx," is dry, siu'mounted by a style, and opens 

 at maturity, so that each of the cells separates by soptifragal 

 dehiscence from the axis of the fruit.^ The cell rises elastically 



violet, or even bluish. The pollen is in spheri- 

 cal grains, opaque ; "on three sides an elliptical 

 cavity ; in this is a papilla wliich swells in 

 water ; external membrane coarse or papillose" 

 (H. MoiiL, in Ann. Sc. Nat. ser. 2, iii. 335). 

 The pollen is generally the same as in Eiadium 

 Pclaygoiiiuw^ etc. 

 ' They have two coats. Sometimes one of 



the two ovules being displaced it becomes more 

 or less obliquely ascendent. 



- They are generally applied to the young 

 fruit afier the fall of the petals. 



^ lIorMEi.sTER has studied this phenomenon 

 of dehiscence in a work where he has .also 

 shown how the cells are prolonged above into 



