139 



Kncjseii (H. Vaago: Midvnaf* {!). Str. : Near Kalbakbotn; freqiicnt 

 bclween Nordredal and Orcenge; southern declivities of Skjællingfjæld; 

 below Orvesljæld (!). Ost.: In several piaces (!). Bord 6: Klakken; 

 al)ove Strand (!). 



101. S. squarrosum Crome. 



B. , 1., Nw. {c). — Væv., not frequent. On moist ground Ironi ab. 

 100 m. nearly to the summits of niountains. Always sparingly and barren. 

 Syd.: Præstefjæld (!). Vaago: Midvaag; Rensatinder; at Kvilchinavatn (!). 

 Str.: Near Nordredal; near Lejnunivatn (L., !); below Orvestjæld (!). 

 Ost.: In several piaces (!). 



Si mm o ns (7) slates thai he has gathered Ihe Spli. rigidiim Sch. 



in Ost. (Slallaratinde), but I did not succeede in gething any spe- 



cimens for examination. 



102. S. subsecundum Nees. 

 B., Nw. (c). 



After an examination of all the forms of S. subsecundum in 

 my possession I can only come to the conchision that the species 

 described by Russow and Warnstorf and derived from the old 

 S. subsecundum cannot be maintained, or at the most can only be 

 regarded as varieties. However valuable the situation of leaf-pores 

 is in separating species in the Cuspidatum-group, this character in 

 the Subsecundum-group is insufficient on account of the absence 

 of other relial)le characters which are present in the species of the 

 Cuspidatum-group. One may have a presentiment of the appearence 

 of new species from the S. subsecundum, but as yet there appears 

 to be too insignificant differentiation. Because of the great number 

 of forms it is, however, necessary to classify them, and with regard 

 to this the situation of pores in branch- as well as in stem-leaves 

 may be relevant. 



A. Most pores in the outer side of branch-leaves and in the inner 

 side of stem-leaves; var. inundatum (Russ.) m. 



B. Most pores in the inner side of branch- as of stem-leaves; 

 var. crassicladum (Warnst.) m. 



C. Most pores in the outer side of branch- as of stem-leaves; 

 var. Gravetii (Russ.) m. 



D. Most pores in the inner side of branch-leaves and in the outer 

 side of stem-leaves. This alternation is represented in my col- 

 leclion by a specimen gathered by F. Gravet in the neigh- 

 bourhood of Namur, and is doubtless the rarest. I have 

 named it var. namurense v. n. 



