146 



place only with difficulty, especially as the flowers are also 

 erect. With regard to the Greenland individuals I have, how- 

 ever, made an observation which points to the possibility of 

 self-pollination — I have seen that the anthers may open at 

 an earlier date, even in the bud." As a supplement to this 

 description given by Warming may serve the following hitherto 

 unpublished notes by Ostenfeld, which are taken from his 

 diary of the Ingolf- Expedition and which I have his kind 



Fig. 3. (Material from Greenland). 



A, A fully expanded flower seen from above; shows that the anthers are at a distance 

 from the stigma. B, Corolla with stamens seen in side view, and C, pistil with sepal of 

 the same flower. D, E, Pollen-grains. F, A young flower the corolla of which has not 

 yet fully expanded; the anthers are open, the stigma is ripe and has already pollen upon 

 it; the anthers being so near to the stigma, self-polUnation may perhaps take place fairly 

 easily, в, A young flower; the anthers are open, and the stigma is ripe; the latter has 

 a tripartite style (see Fig. H). Figures and text are by E. Warming ; 1886. 



permission to quote: '4n a bud which is in the act of 



opening the stamens are bent closely around the style. The 



latter is moist when the stamens are just in the act of 



opening; honey occurs abundantly in large drops at the base 



of the style. (Either homogamous or) slightly protogynous. 



The stamens are always bent somewhat inwards. No scent; 



the flowers were open after rain and always erect." 



The structure of the flower has also been described by 



Skottsberg. 



Hartz records that it is visited by flies. 

 XXX \i. 10 



