175 



The nectary in all the specimens consists of a massive, 

 ring-shaped swelling around the base of the styles, on the 

 finely pitted surface of which numerous drops of honey may 

 be seen to occur (Fig. 1 A, C, E, F). 



Fig. 1. Saxifraga aizoides. 



A, Flower from the north of Norway; distinctly protandrous. B, Pistil of the same. 

 C, Flower from South Greenland (Ivigtiit); all the anthers are open, the stigmas are still 

 unripe. D, Styles of the protandrous stage. E, F, Small-flowered form (Spitzbergen ; 

 Aug. 1,1882; A. G. Nathorst); there are still four stamens with open anthers; the other 

 anthers have been lost. G (from the same locality), Pistil of a flower which has quite 

 finished flowering, and all the anthers of which have fallen off. Я, Trimerous pistil, from 

 the north of Norway. (E. W.) 



P 



Fig. 2. Saxifraga aizoides. 

 From pistillate plants (Spitzbergen; July 27, 1882; A. G. Nathorst). A, Apex of a flower- 

 ing shoot with trimerous pistil; ff, a lateral shoot. B, Flower of same seen from above. 

 C, Another flower. D, Petal and barren stamen. E, Style; there was no pollen upon 



the stigma. (E. W.) 



