590 



A. HESSELBO 



The Bryophyte carpet of the heath ^vas composed of Hijloco- 

 iniiim parietinum, H. prolifcrum, Hijpniim uncinatiim, Rhacomitriiiiu 

 hypnoides, Dicraniim scoparinm, I), fuscescens, D.molle, Plilidium 

 ciliare, Lophozia Flærckei, L. hjcopodioides, L. ventricosa, Ceplialozia 

 bicn.sj)idata , C. pleniceps and scatlered cushions of SpbcKjuum Gir- 



l'i{^ 2(). Kiiolly nioor of Heluld niiiui inteniiixcd with .S'((//,r Uinatii and Sdli.v phjilicifolid. 

 riroiind vcgelation : Eiuiwlruin. ArclttsUtphi)U)s iiiui iirsi. Antlio.vdntluim udnrnlum and 



l't>h]in)Uiuu i'iinpaniii). 



(/ensohnii. The Dicronum spp. espccially D. scojjciriiim oflen fornied 

 conlinuous carpets, which appears to conespond ^vilh the "Dicra- 

 niim heaths" desciibed by C.Jensen, 1910, p. 202. 



Knolly Betula nana Heath near Ljosavatn (Fig. 20). In 

 addition to Betula nana, which formcd the bulk ot' the vegetation. 

 Ihere occurred scaltered shrubs of Salix pbijlicifolia, S. glauca and 

 numerous grasses and flowering planls. Mosses and Hverworts 

 grew abundantl}^ on the knolls and on the ground between them. 

 The following species were observed : Hijpnum nncinatum, Rhaco- 

 niitrnun canescens, R. hypnoides (all in abundance), Hylocominm pro- 

 lifernm, H. rugosnni, H.squarrosnm, Camptothecinm nitens, Heterocla- 

 dinni sqnarrosnlum, Brachythecinm erythrorrhizon, Polytrichum juni- 

 perinum, Timmia anstriaca, Conostomnm Iwreale, Pohiia crnda, Bar- 

 Iramia ityphylla. Tortella tortuosa, Dicrannm conyestum , Ditrichum 



