Rosaceæ. 



81 



down to the pistils; they have similar finely warted filaments to 

 those 0Î Rub. ardicus (Fig.Sl), which likewise terminate abruptly 

 above in a smooth and much thinner portion, and in my 

 opinion the pollen from them must certainly fall upon the 

 stigmas." H. MtJLiÆR (Alpenblumen, p. 216) arrives at the 

 same conclusion. (Compare Fig. 31). Warming states in his 

 notes that the stigmas become functional very early; even 

 in the hardly expanded flowers from Talvik in northern Nor- 

 way they are highly papillose; the outermost stamens are 

 the next to become functional and afterwards the others. But 



Fig. 31. Rubus saxatilis (Talvik in Arctic Norway). 



A and B, Flowers (about '/i); -ß. in longitudinal section. C, A stamen (about 'Vi) ; 

 cf. text. Drawn by Eug. Warming. 



even if the flowers have perhaps at that time a short prote- 

 rogynous stage, they become homogamous at any rate early. 

 As regards the supposed importance of the warts on the 

 filaments see Rub. arcticus, p. 97. Poppius (1. c.) records that 

 in Finland Rub. saxatilis is eagerly visited by Vespa vul- 

 garis L. 



The flowering begins in Scandinavia in June; Norman 

 records June 21. In some years it does not set fruit in the 

 northern districts of Arctic Norway. The fruits may be 

 ripe on July 28 (Norman). In Greenland it is usually found 

 without fruit, and in the Færoes it sets fruit sparsely. ^ 



* Ostenfeld, Plantevæxten paa Færoerne, København, 1906. 



XXXVII. 6 



