96 



Knud Jessen. 



(1886), who says: "The hermaphrodite flowers are 6- or 7- 

 merous, more rarely 8-merous and have a varying diameter 

 (about 18 — 30 mm.). The dark-crimson, stellately expanded 

 or even somewhat reflexed petals are highly conspicuous 

 with the green field as a background; therefore it is inter- 

 esting that the flower is nevertheless well adapted for self- 

 pollination." 



"On regarding the flower from above one does not see, 

 as in the other Rubus-species, that the styles with the stigmas 



Fig. 37. Rubus arcticus. 



A, A flower seen from above. B. A longitudinal section through a flower the anthers of 



the outermost stamens have opered. D and G, Two stamens from the innermost circle. E, A 



stamen from the outermost circle. F, A pistil. — Cf. text. D, E, F G 10 /r, Arctic Norway 



(Kug. Warming 1. c.) 



are situated in the middle and are closely surrounded by the 

 stamens, which are of about the same length; here, only the 

 stamens are seen which from all sides bend inwards toward the 

 centre of the flower so that the central part is quite hidden. 

 A longitudinal section shows best how they unite closely in 

 a conical fashion with the upper ends more or less bent in- 

 wards and with all the anthers gathered above the centre of 

 the flower. (Fig. 37, A,B). The outermost stamens are the 

 longest, their filaments become, from a thinner, entirely 

 smooth base, gradually thicker and also covered with small 



