289 



#ngrnal g^rtixlcs. 



RECENT ADDITIONS TO OUR MOSS FLORA.— Part IV. 



By K. Braithwaite, M.D., F.L.S. 



(Plates CXIX., CKX.) 



DiCRANACE.B. 



Dicrauella Schreheri, (3. robnsla, Sclipr. — D. leuta, Wilson, ms. — Re- 

 seuibling a starved condition of D. sq/iarrosa, but in the leaf structure 

 entirely according with D. Schi'eberi, with which for the present I retain 

 it. Specimens with perfect fruit are given under n. 74 in Rabenhorst's 

 ' Brvotheca,' the lid being shorter than in the typical form. Found at 

 various places in Cheshire, at Milnthorpe by Mr. Barnes, and near Melrose 

 with young fruit by Mr. Jerdon. 



Ditrichum zonatnm (Brid.), Lorentz. — TFeissia zoiiata, Bridel, Brv. 

 Univ. i. p. 364. — This is the correct synonymy of the plant described as 

 D. tenne, ^. in Journ. Bot. 1870, p. 228, and for the present that species 

 remains a desideratum in onr fiora. I may add that Mr. Fergusson sub- 

 nutted specimens to the late Dr. Milde, Avho confirmed the correctness of 

 the diagnosis ; the fruit is unknown. 



D. Jlcxicanle, y. compaclam, Stirton. — D. Briimmondii, "VVils. nis. — In 

 large tufts densely matted vvith purple radicles ; stems shorter, leaves 

 shorter and thicker with denser areolation. Connected with the typical 

 form by the var. /3. denimm, which Mr. Barnes sends from Helsington 

 Barrows, Westmoreland. — Hab. Sides of rills on Ben Lawers (Dr. 

 Stirlon, ISGG). 



Triciiostomaceje. 



To this family I unite the J'Feisinceae, for the two groups approximate 

 so closely in areolation, that it is not possible to draw any well-defined 

 limit between them. We may, however, conveniently form three sub- 

 families, Weisiece, Encaly piece, Trichodumea;. 



Weislers. 



Jnoiclninjbiyn, (pstivnm, (3. peU/icidnni, Wilson, ms. Leaves pale vel- 

 lowish, scarcely at all crisped when dry. — Near Inverary, growing with 

 the normal form. 



JVeisia (§ Ilyiiienosti/litihi) coinmiitala, Mitten, Proc. Liim. Soc. vol. 

 i. Snpp. p. 32 (Plate CXIX. f. 1). Dioicous, resembling ir.ctirvirost?-is. 

 Leaves from a snb-ol)long base, lanceolate, narrowed, keeled with the 

 nerve, which vanishes below apex, cells nearly all elongated and pellucid ; 

 perichiftial leaves similar. Fniit like that of If. cxrvirofilris. Resembles 

 the figure of (li/nnioalojinnii pallidiselum, Nees and Hsch. in Bry. Gerip., 

 but as Mr. Mitten observes, it cannot be referred to any species whose 

 leaf structure is not described. — Hab. Alpine rocks, Nant-y-Fydd, Wrex- 

 ham (Mr. Bowman). For the specimen figured I am indcbled to my 

 friend Mr. Da vies. 



ir. tritiicicola, De Xotaris, Epilogo della Briol. Hal. p. 598 (Plate 



VOL. I.\. [OCTOBER^ 1871. J U 



