60 



BRITISH HEPATIC^. 



Radida {Plagiochila) spirmlosa, Dumort. Syll. Jung. p. 43, n. 29. 



MaHinellia apinulosa, G. & B. (Emend.) in Nat. Arr. i. p. 692, n. 8. 



Plagiochila spinulosa, Dumort. Rev. Jung. p. 15 (1835) j Mont, et Nees in Leberm. 

 Eur. iii. p. 518 (1838) ; Lindenb. Sp. Hep. p. 6, n. 1, t. i. ; G. L. N. Syn. Hep. p. 25 ; 

 Boul. Muse. p. 770 J Cogn. Hep. Belg. p. 25 ; G. & R. Hep. Eur. Ex. p. 500. 



IdchenasPrvm, ramosius foliis trifidis, et 



L. pinnidis cdtemis quasi spinosis, DiU. Muse. p. 489, t. 60, £ 15, 16. 



punctata, smaller, densely csespitose, repeatedly ramose, ulti- 

 mate branches flagelliform; leaves punctate, loosely imbricated, 

 patent-divergent, roundish-ovate from a contracted less decurrent 

 base, apex and ventral margin spinose-dentate ; colesule axillary, 

 obcordate, alate, truncate-bilabiate, alse distantly toothed, apex 

 densely spinulose. 



^*fiagellifera, most of the branches flagelliferous, intertwined, 

 fastigiate, naked or microphyllous ; leaves not much broader than 

 the stems, obovate-cuneate, patent, recurvo-convex, scarcely de- 

 current, 2-3-dentate ; amphigastria frequent. 



Plagiochila pvnctata, Taylor in Lend. J. of Bot. 1844, p. 371 (sub n. 10), et 1846, 

 p. 261 ; G. L. K Syn. Hep. p. 626; Dumort. Hep. Eur. p. 45, n. 7 : G. & R. Hep. 

 Eur. Ex. n. 211. •' ^ ^ ' F F , . y 



Plag. spinulosa ft punctata, Carr. Irish Cryp. p. 19, t. 2, f. 3 (1863) ; Mackay, II. 

 Hib. p. 58, n. .10. 



8 inermis, closely tufted, shoots slender, leaves roundish-ovate, 

 obliquely retuse or bidentate at the apex, margins recurved, mostly 

 entire. 



Hab. Not unfrequent in sub-alpine districts throughout the British Isles. Rare 

 in the south of England : — Devon, and Rufus-stone, New Forest, 1812, G. Lyeli ! Pen- 

 zance, W. Gurnow ! Jersey, I860, Mrs. McKenzie ? .' Bolton wood ? J. Nowell, and 

 Ingleboro, rare ! Always barren. 



ft. One of the most abundant species about Killamey and the S. W. of Ireland 

 generally. Cromagloun, Dr. Taylor, 1829 ! Scotland, Bowling, A. McKinlay I Snow- 

 don, G. Dames ! 



y. Glengariffe, Sep. 28, 1869! GaUoway, 1843, R. Spruce (named "possibly 

 P. decipiens"). Head of Mardale,. Westmoreland, May 1869, G. Stabler 1 



(J plants rare, Head of the Upper Lake, Killamey, and Cromagloun, 1861 ! 



Ft'onds either intermingled with other hepaticse and mosses, or 

 forming dense cushion-like tufts on rocks, or investing the trunks 

 of trees. 



Rhizomatous shoots creeping, entangled, leafless, sub-Hgnose, of 

 a dirty-brown colour, radiculose on the under side. 



Rootlets white, capillary, irregularly distributed, and confined 

 to the creeping stems. 



Stems upright or reclinate (f. 14, 1), about the thickness of ordi- 

 nary sewing-thread, of firm texture, reddish-brown, flexuose, simple 

 or dichotomously branched (f. 14, 2), or emitting irregular innovant 

 shoots from the axils of *the terminal leaves. Texture sub-lignose, 



