290 RECKNT ADDITIONS TO OUR MOSS FLORA. 



CXIX. f. 2). Dioioons ? in large dense tufts, interwoven at base with 

 ])ranclied radicles, bright green. Stem innovating dichotomously 1-2 in. 

 high, flexile, reddish, bearing lax radicles at the lower part from the axils 

 of the leaves. Leaves approximated, erect when moist, and often some- 

 what secund on the young shoots, rather soft, papillose at back, from a 

 narrowly lanceolate base, gradnally subulate, channelled, with a thin 

 nerve reaching the apex, the margin not revolute, sharply denticulate 

 above and on the back of the nerve ; when dry strongly cirrhate and 

 twisted. Cells at base large cylindraceo-vesieidar, the rest small quadrate 

 or subhexagonal, filled with deep green chlorophyll. Growing in ex- 

 panded tufts like TF. cirrhata, the leaves resembling those of TF. Bruntoni, 

 but longer and the margin not revolute. — Hab. On the base of the trunk 

 of an oak in Lower Nuthurst, Sutton Park, Birmingham (J. Bagnall, 

 Aug. 27, 1870). Identical with original specimens gathered by Carestia 

 in the Val d'Intrasca near Verbano. 



Trichostonu'Oi. 



As the synonymy of this group has been so carefully worked out by 

 Professor Ijindberg in his valuable paper " Om de Europeiska Tricho- 

 stomea? " (Oefversigt Kongl. Yetenskaps Akad. Porhandlingar, 1S64), I 

 take advantage of it to enumerate all our species, availing myself also of 

 Mr. Mitten's admirable paper on Fottin (See Journ. Bot. IX. (1871) 

 p. 2). This great bryologist takes by far the most philosophical view of 

 the group when he advocates the union of Pottia, Desmaiodon, Tricho- 

 stovuim and Turlnln, into one natural genus ; as a matter of convenience, 

 however, I retain here the three principal, though every one who studies 

 them will find that the lengthening of the teeth of Trlchodomvm, and 

 their twisting into those of Torlalci, is so gradual that it is difficult to 

 draw the line between them, while it separates such closely allied species 

 as Tri.ch. cyjiiidricum and Tort, turtnosa. In Turtula I adopt the sections 

 used by De Notaris. 



Tjpliemerella rt-curvifoHa , Dicks. 



Phascum. — 1, P. triquetnim. Spruce ; 2, P. muticum, Schrcb. ; 3, 

 P. Plbrknanum , W. and M. ; 4, P. acaulon, L. {cuspidatnm, Schreb.) ; 

 5, P. curvlcoUiim, Hed. 



Pottia,— 1, P. pusilla, Hed. 1782 {cavifdia, Ehrt. 1^87); 2, P. recta, 

 Liiulb. {Phascnm rectum. With.) ; 3, P. Starkennn, lied. ; 4, P. cccspitoHn, 

 P)ruch ; 5, P. tnoicatnla, L. ; 6, P. crinita, Wils. ; 7, P. TFllaoni, Hook. 



8. P. llttoralh. Mitten, Journ. Bot. IX. (1871), p. 4. Leaves q\iin- 

 qucfarious. oblong, subspathnlate, tiie lower pale, upper green ; upper 

 cells half the size of those in P. triivcatula, lower oblong pellucid, all 

 sm )oth ; nerve excurrent. Capsule oblong-oval, somewhat narrower at 

 the mouth, lid rostrate, slightly twisted, male flower gemmiform. Beach 

 at Aldrington and Hastings. I have not seen specimens. 



9. P^anpernla, Mitten, Journ. Bot. 1871, p. 4 (Plate CXIX. f. 3). 

 Leaves quinquefarious, obovate-spathulate, acute, upper cells rhomboidal 

 and quadrate hexagonal with obtuse papillae, lower oblong, pellucid, nerve 

 excurrent. Calyptra with a fevv scattered papilla3 ; capsule oval ; lid 

 rostrate, antheridia naked in the axils of upper leaves. — Hab. Henfield 

 Mitten ; Penzance, Cvu-now ; Jersey, Piquet. 



10. P. vlridlfolla. Mitten, Journ. Bot. 1871, p. 5 (Plate CXIX. f. 4). 

 Leaves octicfirious, obovate-spathulate, obtuse, nerve excurrent, margin 



