352 



Morten P. Porsild. 



The flowering season is the middle of the summer, 

 consequently the species do not belong to the earhest 

 flowering. In an average year they will, on the latitude 

 of Disko, be out from the end of July, and then flowering 

 specimens are to be met with afl through the rest of the sum- 

 mer, because the floral shoots from the same tuft are not 

 all of them developed simultaneously. 



Under each flower a smafl 3-dentated bractlet is 

 present vvhich often envelops the peduncle. In T. palustris 



Fig. 5. T. palustris (Norway.) 



A. Part of inflorescence; note the small, 3-dentated bractlet. 



B. Flower at the beginning of the hermaphrodite stage: the stamens 

 arise from the spoon-formed perigonial leaves. 



C. Stamen in a perigonal leaf when the flower bursts. 



D. Anther with open valves. 



E. Carpels in the stage of pollination. 



F. A single carpel, more highlj' magnified, showing pollen-grains 

 on the stigma. (Drawn by E.W.) 



it is always shorter than the peduncle (Fig. 5 A), in T. cocci- 

 nea just as long as this or longer (Abromeit). In the latter 

 a fairly well-developed '"calyculus" is as a rule present, a 

 bi-symmetrical whorl of 3 small leaf-formations of which 

 one is turned outwards, the other two transversal (Fig. 6j. 

 The morphological interpretation is uncertain. In T. palu- 

 stris it is normally absent, but may also, according to 

 Abromeit, occur occasionallv. 



