A. HESSELBO 



0.006 mm. broad, and 610 times as long, thin-walled, pointed and 

 wavy. On the whole, both the cell-tissue of the leaf and the form of 

 the leaf-teeth call to mind far more an Eiirhijnchium or a Rhynchosteginm 

 than an Amblystegiam. 



Amblystegiu.ni salinum Bryhn grows in loose, yellowish green, hardly 

 tomentose tufts. Rhizoids occur only on the lowermost part of the 

 stem and scantily on the back of the nerve. The stems are erect or 

 ascending, slightly and irregularly branched. The leaves are far more 

 distant than in A. compactiim, are spread out almost horizontally, very 

 longly decurrent, ovate-lanceolate, with long, often somewhat obtuse apex; 

 all are similar or the branch leaves are somewhat narrower. The leaf- 

 margin is finely and obtusely toothed till towards the apex. The leaf- 

 cells have the appearance typical of Amblystegium, and in the upper 

 half of the leaf are 0.008 mm. broad and 46 times as long, with 

 sinuose primordial utricle (the latter is usually wanting in A. compactiim} f 

 The nerve is green and sinuose (as in A. variuni) and vanishes just 

 below, or in, the leaf-apex itself. A. salinum is undoubtedly a true Eii- 

 Amblystegiiim which is nearest allied to A. serpens, but also approaches 

 certain forms of A. varium (Hedw.) as regards the form of the basal 

 cells of the leaf and the long sinuous nerve. It would also be remark- 

 able if a species like A. compactiim, which in North America grows on 

 rocks and on damp ground in woods in the interior of the country, 

 should in Europe turn into a decidedly salt-soil plant. A. salinum has 

 been collected in many places along the coasts of Sweden and Norway; 

 first by Zetterstedt on Oland and near Bosekop in Finmarken, and 

 in the herbarium is named by him Amblystegium serpens var. litlorale. 

 Ha gen has collected Ihe same species in Salten in Nordland (65 15' 

 N. lat.), where it was growing in company with A. littorale (C. J.), and 

 in a letter he named it Amblyslegium breve n. sp. On the other hand, 

 it is not known to me that the real A. compactiim has been collected 

 in Scandinavia. I have not seen the A. compactiim from salty soil in 

 North Germany mentioned by Loeske (loc. cit. pp. 272 273), nor have 

 I seen Monkemeyer's A. compactiim from Bornholm. 



280. Amblystegium salinum Bryhn. 

 Vestmannaey! on damp sandy soil near the coast, sterile. 



281. Amblystegium trichopodium (Schultz) Br. eur. 



N. Iceland: Grimsey (O. D.)!. 



Judging from the plentiful intermixture of Green Algae, the plants 

 from the above localitj' must have been growing on wet, probably muddy 

 ground. ^ and $ flowers were present in great numbers; fruit, on the 

 other hand, had not been developed. The stem leaves were rather close- 

 set, horizontally out-spreading, from an ovate base tapering to a long 

 and slender point, finely toothed along the entire margin, 1.2 1.5 mm. 

 long and 0.500.55 mm. broad, with green nerve, 0.040.045 mm. wide. 

 The branch leaves were lanceolate, 0.95 mm. long and 0.300.35 mm. 

 broad, with short green nerve. At the base of the leaf the cells were 



