528 A. HESSELBO 



0.006 mm. broad, and 6—10 limes as long, thin-wallcd, pointed and 

 wavy. On the wliole, bolh the cell-tissue of the leaf and the form of 

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

 than an Amblystegiiim. 



Amblysleginm salinum Bryhn grows in loose, yellowish green, liardly 

 tomentose tufts. Rhizoids occur onlj^ on tlie lowermost part of the 

 slem and scantih^ on the back of the nerve. The stems are erect or 

 ascending, slightly and irregularly branched. The leaves are far moi'e 

 distant than in A. compactiim, are spread out almost horizontall}', very 

 longiy deciirrent, 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 Amblystegiiim, and in the upper 

 half of the leaf are 0.008 mm. broad and 4—6 times as long, with 

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

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

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

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

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

 cclls 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 tlie country, 

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

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

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

 in the herbarium is named by him Amblyslegium serpens var. littorale. 

 Hagen has collected the same species in Salten in Nordland (65° 15' 

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

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

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

 in Scandinavia. 1 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 Ihe coast, sterile. 



281. Amblystegium trichopodium (Schultz) Br. eur. 



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



Judging from the plentiful intermixture of Green Algæ, the piants 

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

 ground. J* ^nd ^ flowers wcre present in great numbers; fruit, on the 

 olher hånd, had not been developed. The stem leaves were rather close- 

 sel, horizontallj' oul-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 0.50—0.55 mm. broad, with green nerve, 0.04 — 0.045 mm. wide. 

 The branch leaves were lanceolate, 0.95 mm. long and 0.30—0.35 mm. 

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



