Caryophyllaceæ. 



251 



ciliata ß norvegia developed in Lappmark, in the year in 

 which they germinated epicotyl-shoots with long inter- 

 nodes which often branched in the first year, but not until 

 after the lapse of some years did they flower. Also under 

 cultivation by me, they branched very soon. 



Pulvinate forms. It is evident from what has been 

 said regarding the form of the shoots, that there are not 



Fig. 10. Cerastium alpinum. 



I lie youngest part of the shoots are densely covered with woolly hairs. 



(From Iceland; Helgi Jonsson; 16. 1. 1894.) 



such good conditions lor the development of a pulvinate 

 habit as in the first three types. It does occur however 

 (Fig. 9). Cerastium caespitosum has been found in East Green- 

 ami with globular cushions, and Porsild (Medd. ora Grönl., 

 vol. 50, p. 370, Fig. 12) has figured a form regarding which 

 he says "it differs greatly from the numerous forms of the 

 species;" "especially distinctive is the low, densely-tufted 

 growth, and the glabrous, obtuse, rosette leaves, etc." There 

 is also mention of dense tufts in Cerastium nigrescens, and 

 regarding Arenaria ciliata Lund ager records "dense and 



