166 THE JOURNAL OF BOTANY 



FOSSOMBRONIA. 



, (Spores furnished with papillfe 2 



(Spores with crests 3 



,y ( Papillas 20-25 on face and end of spore ccespitlformis 



" (PapilliB about 110 on face and end of spore Mittenii 



Q (Crests in nearly parallel lines 4 



( Crests forming alveoli 5 



. I Crests on face 15-24 pusilla 



(Crests on face 28-36 cristata 



/Margin of spores appearing as if winged; alveoli 7-10 on face of spore 



_J angtilosa 



j Margin appearing as if crenulate, not winged ; alveoli at least 2-3 



I times as numerous Dumortieri 



CALYCULARIA. 



(■Involucre laciniate, per. oblong; rootlets yellowdsh Jiyhernica 



j Involucre lobed, plicate, per. campanulate ; rootlets reddish brown ; 

 ( alpine plant Blyttii 



PELLIA. 



/Paroicous; ant. margin of invol. absent, mouth looking towards apex 

 I of frond, calyptra much exserted; int. wall of capsule with 



1-! numerous rings epiphylla 



I Dioicous ; invol. forming a complete ring, mouth erect ; fronds usu. 



V narrower and darker-coloured 2 



[Int. wall of capsule without rings, calyptra usu. immersed; male 



P 1 plant with dichotomous furcate innovations calycina 



' 1 1nt. w^all of capsule with some rings, calyptra exserted ; male plant 

 ( without such innovations Neesiana 



ANEURA. 



(Frond simple or with a few short undivided branches, thick, fleshy, 



1 -j channelled above, margins usu. crisped .pinguis 



(Frond repeatedly divided, not fleshy, margins rarely crisped 2 



(Branches broadly winged, stem biconvex, 6 cells thick at middle, two 



2] cortical smaller muUifida 



(Branches not w'inged (margins not attenuated) 3 



(Branches erect or procumbent, frequently narrowed towards the ends, 



and palmatifid ; usu. on logs pabnata 



Branches prostrate, never palmatifid, and rarely narrowed towards 



I the ends 4 



/ Monoicous ; small, stems 5 cells thick in the middle, internal cells 



. j not larger than the cortical latifrons 



1 Dioicous; rather large, stems 6-7 cells thick in the middle, internal 

 ( cells larger than the cortical pinnatifida 



METZGERIA. 



, (Frond hairy on both sides .piihescens 



(Frond without hairs above 2 



Post, s de of nerve 2, rarely 3, cells broad ; hairs on margin geminate, 



long and curved; dioicous hamata 



Post, side of nerve 4, rarely 3, cells broad 3 



(Hairs single, rarely on the margin, but just within it; dioicous 



3 \ furcata 



I Hairs on the margin, mostly geminate; monoicous conjugata 



' 



