370 Morten P. Porsild 



45. Car ex cap ellaris L. — On heaths, in bogs which are not 

 too wet, and on rock-ledges; common. In the interior of Lakse Fjord, 

 in favourable localities, it attained a height of as much as 25 cm. 

 (f. robiistior Lange). 



46. Ca rex pull a Wahl. — Common along the margins of lakes 

 and pools. Usually it composes there the bulk of the vegetation 

 together with Eriophorum polystachijm. It varies somewhat according 

 to the higher or lesser degree of dampness of the habitat. In dense 

 vegetation was found a 



f. d e b i 1 i s ! Ciilmi sat longi, folia angustissima, spiciilis femineis 

 solitariis vel binis pancifloribus, globosis, axillaribiis vel brevipedicellatis, 

 stigmatibiis diiobus. 



The northern limit of the species is recorded to be 72° 30' (Osten- 

 feld, Fl. Arct.). 



Along the margin of a small lake at Sarfarssuit there was a 

 dense growth of Cyperaceœ , in addition to Eriophorum polijstachiiim, 

 especially Carex pulla, С aquatilis var. stans and С. rigida var. Bige- 

 lovii. Of these С. pulla was dominant and dense growths occurred 

 in several places. In such growths some tufts were found in which 

 female spikes were either absent from all the stems or were few 

 in number and small, sessile and sterile. As it occurred to me that 

 these plants might possibly be of hybrid origin I preserved, in 

 addition to herbarium-material, some specimens in alcohol for closer 

 investigation, both of the presumed hybrid and of the sedges standing 

 around it. 



On subsequent investigation I could not find, however, any points 

 in which it differed from С pulla, either in the external or internal 

 structure of the vegetative parts, or in the male spike and its organs; 

 for instance, all the pollen grains were well developed. The reason 

 why I nevertheless draw attention to the plant is because it is also 

 found in other places and because there also it is the entire tuft, 

 i. e. the whole plant, and not a solitary stem, which occurs as des- 

 cribed above. 



In our collection I found similar specimens from the head of 

 Lakse Fjord. At Godhavn С. pulla is common along lake-margins 

 and there, mixed with the normal individuals also occur forms 

 without female spikes. 



47. Cobresia bipar tita (All.) Dalla Torre. — At Igdlorssuit it 

 occurred sparsely on heaths ; in other places it was possibly overlooked. 



48. Sei r pus acicularis L. f. submersus Hj. Nilss. — This 

 plant which has been only observed a very few times in Greenland 

 was found in a dried-up pool at Sarfarssuit, 71° 42'. Though it was 

 not submerged there, when gathered, yet it was quite sterile. 



