Hypnace^.] 20 [Amblystegium. 



This moss differs so much in habit from A .fiUcimm that I think it worthy 

 to rank again as a species. The direction of the leaves.'with their very- 

 strong excurrent nerve, and different formation of the base, combined with 

 the almost total absence of paraphyllia afford strong distinctive characters. 

 It bears much resemblance to A.fluviatik and grows in similar localities. 



3. AMBLYSTEGIUM CURVICAULE {Jitratz.) Dixon. 



Dioicous ; stem with few branches or nearly simple. Leaves 

 erecto-patent, broadly oval, suddenly acuminate, auricled at base, 

 nerved to base of acumen. (T. LXXXVIII, B.) 



Syn. — Hypnum curvicaule Juratz. Verhandl. zool. -bot. Ges. Wien xiv, 103 (1864). Schimp. 

 Synops. 2 ed. 806 (1876). Venturi in Rev. bryol. 1881, p. 82. HusN. Muse. gall. 427, 

 t. 124 (1894). 



Amblystegium filicinum * curvicaule Lindb. Muse, scand. 32 (1879). 



Amblystegium curvicaule Dix. James. Stud. Handb. 447 (i8g6). 



Dioicous ; in yellowish-green tufts, fuscescent at base, stems 

 ascending, flexuose, with very few radicles, ramulose or nearly simple, 

 curved at apex, nearly naked and very slender at base. Leaves erecto- 

 patent, glossy, laxly imbricated when dry, the uppermost subsecund, 

 cauline broadly ovate, suddenly shortly acuminate, plano-concave, with 

 a slight fold on each side the flat nerve, which vanishes at base of 

 acumen, or between that and the middle of leaf; base auricled, the cells 

 at angles yellowish, oblongo-rectangular, upper 4 times as long as 

 broad ; branch leaves narrower with a longer acumen, margins very 

 minutely serrulate, upper cells rhombic and trapezoid, basal yellow ; a 

 few small circular and lanceolate paraphyllia are found near the base 

 of the branches. 



Hab. — Mountain rocks, very rare. 



Ben Lawers at 3500 ft. {H. N. Dixon July, 1893) ! ! 

 Var. /S. strictum Dixon. 



Stem and branches prostrate, rigid ; branches straight, cuspidate. Leaves 

 narrower, oblong-lanceolate, not plicate, cells elliptic-hexagonal, narrower, 

 6 — 8 times as long as wide. 



Hab.— Ben Lawers with the type {H. N. Dixon). 



This interesting moss was first found in the Austrian Tyrol, and since in 

 Switzerland, Styria, Norway, Lapland, &c., but always sterile. It is 

 undoubtedly allied to A. filicinum, but has a distinct facies and different habit 

 by which it may always be separated. 



