288 



EuG, Warming. 



foliage-leaves which persist through the winter, and not to 

 differ from the type in regard to the flowers. 



Iceland. (Reykjavik). Protandry. 



Norway. As in Greenland, sometimes even protogy- 

 nous (Alten, about 70° N. lat. ; Tromsö). Gynodioecism: 

 Kongsvold (16. 7. 87). 



LiNDMAN is of opinion that the anthers are placed so far above 

 the stigmas that self-pollination cannot take place until in the last 

 stage, when the fully grown and revolute styles may reach the anthers. 

 — Sweden: Slight protandry (Axell). — The Alps: Gynodioecism; 

 protandrous (but $ much rarer than ^: Ludwig). — Italy: Homo- 

 gamy (Ricca) 



Fig. 26b. Cerastium alpinum ß cæspitosum Malmgr. 

 From Spitzbergen (Nathorst; 20. 8. 1882). 

 A, A branch, natural size; lower part quite glabrous and with very 

 small, close-set foliage-leaves; upper part covered with long, scattered 

 hairs (not glandular hairs). The lowermost leaves have persisted through 

 the winter, a^, A pair of foliage leaves. 5, A flower opened and its 

 parts spread out artificially. C, Sepal. D, Petal. E, The basal part 

 of a cal.-st. F, Style with germinating pollen-grains. There was still 

 some pollen left in the anthers of the flower of which the style is shown 



in Fig. F. (E. W.) 



3. Cerastium latifolium. L, 



Norway (Dovre; 15. 7. 1887). ^ have petals about 

 8 mm in length; the stigmatic papillæ extend downwards 

 only ^/4 or ^/5 the length of the style. Slight protandry, but 

 homogamy soon ensues, and in the specimens investigated 



