59 



in diameter (as also, according to Ljndman, p. 75, do those upon 

 the plants found on the Dovre mountain; in Nova Zembla, 

 according to Ekstam they measure from 12 to 20 mm.; and 

 upon Pirola rotundifolia in Denmark and Sweden, they measure 

 from 14 to 16 mm.; cf. Fig. 42 A and K). The two back 

 petals arch slightly above the erect stamens (Fig. 42 B). 



Fig. 40. Pirola rotundifolia var. grundiflora. (From Upeniivik 

 in West Greenland; May 27.) 



A (about i/i); the basal portion of a floлvering plant; the rhizome bears the leaves a and 

 Ь on that year's growth which is the oldest but one; 1 — 5 foliage-leaves and 6 — 10 scale- 

 leaves of the nest year's growth; p, scale-leaves. B, The apex of a runner with two 

 foliage-leaves (L) and a terminal vegetative bud. C, A similar runner with a terminal 

 floral bud. D, A runner with branches and bearing a foliage-leaf near its apex. E, An 

 inflorescence which has been taken out of a terminal floral bud. F — /, Parts of a flower 

 from the same inflorescence; iF) stamen; (G) petal; (//) petal with two stamens: and (У) 

 pistil; length of petal about Va mm. (E. W., 1907.) 



Homogamy appears to be the rule. Even before the flower 

 is quite open the stigma is viscid and the pores of the anthers 

 are widely open (Fig. 42 H, I). 



In the bud the pores of the yellow anthers are turned 

 downwards (Fig. 42 H, I) as in the other species of Pirola, 

 so self-pollination is impossible, as Lindman has also pointed 



