278 HEPATIC^. 



Obs. — This species iu its normal state is only to be confused 

 with Flagiodiila punctata^ Tayl., which see. 



The small flagelliferous forms, of which there many, are apt to 

 be mistaken for PlagiocJiila tridcuHcvhifa, Tayl., but this species is 

 at once separated from any of them by its erect habit, darker 

 coloured leaves, which also differ in shape and cell structure. 



The American F. spinnlosa of Sullivant and others has justly 

 been removed to anotlier species, P. Sidlivantii, Gottsche MS., see 

 Evans' admirable monograph, " North American Species of Plagio- 

 chila," Bot. Gaz., April 1890. 



Description of Pj.ate CXVI. — Fig. 1. Plant natural size. 



2. Portion of stem x 24, antical view (Cader Idris, J. Ealf's). 



3, 4. Leaves x 24 (Cromaglown, Lindberg). 5. Portion of leaf 

 X 290 (ditto). 6. Bract x 24 (Cader Idris, J. Balfs). 7. Perianth 

 X 24 (ditto). 8, 9. Perigonial bracts x 24 (Cromaglown, Lind- 

 berg). 10. Antheridium x 24 (ditto). 



5. Plagiochila punctata, Ta^I. 



riagiochila pu7ictata, Tayl. Hep. Antarct. in Lond. Journ. of Bot. p. 371 (1844); 



G.L.N. Syn. Hep. Suppl. p. (V2G (1817). 

 Plagiochila spinulosa, var. pu7ictata, Oarr. Irish Crypt, p. 10, t. 2, f. 3 (1803). 



Dioicous, densely csespitose, flagelliferous, medium size, yellow 

 or olive-brown, young plants pale green in colour. Stems erect, 

 dark brown ; radiculose, rootlets whitish, branched, branches 

 arising from the axil of the upper leaves or bracts, lateral, but 

 slightly subpostical. Leaves patent to patent-divergent at an 

 angle of 55° (from 50° to 70°), alternate, obliquely inserted, lower 

 leave smaller, more distant, others subapproximate, only slightly 

 decurrent antically, roundish-ovate or roundish-oval, upper margin 

 recurvate, spinose-ciliate, lower margin entire or almost so; 

 texture firm, cells small, roundish, lumen clear, walls thick, 

 angles thickened, trigones wanting, punctate. Stipules wanting, 

 or rudimentary. Bracts larger than the leaves. Perianth from a 

 narrow base broadly obovate, compressed at the mouth, bilabiate, 

 truncate, mouth wide, spinose-ciliate. 



