FISSIDENS. ng 



r /Leaves with distinct hyaline border (seta terminal) 2 



(.Leaves without hyaline border 10 



2 /Male inflorescence axillary ; nerve usually percurrent, and forming amucro 3 



\Male inflorescence basal or terminal ; nerve rarely reaching apex 5 



/Tufts matted with red radicles 6* Curnowii 



•'(.Stem not radiculose 4 



/Plant small ; leaf-border narrow ; on banks, &c 6. bryoides 



\ Plant larger ; Is. opaque, nerve and border thick ; on wet rocks 7. rivularis 



./Plant small ; border narrow, colourless 6 



■'\Plant taller ; border strong, coloured 9 



g /Capsule incurved, cernuous 7 



\Capsule erect (or inclined), symmetric 8 



/Ls. 3 or 4 times as long as broad 4. incurvus 



' \Ls. very short, about twice as long as broad ; capsule shorter... .y. tamarindifolius 



aicous ; seta very short ; ls. more or less uniform 2. viridulus 



icous ; minute; upper ls. longer and narrower, ensiform 3. pusillus 



bluntly acuminate, border yellowish, cells rather lax, not incrassate 



8. crassipes 

 usually obtuse, nerve and border reddish, cells smaller, incrassate... g. rufulus 



(.Ls. 



/Plant minute, with only 3 or 4 pairs of leaves ; seta terminal 1. exilis 



\ Plant rather tall, with several pairs of leaves 11 



/Nerve excurrent in apiculus ; seta from base of stem /y. taxifolius 



\Nerve ceasing below apex 12 



■G 



fLs. entire, or obscurely toothed near apex 13 



|_Ls. sharply toothed near apex, usually with paler marginal band 14 



/Ls. scarcely I line long; seta terminal 10. osmundoides 



■'l.Ls. 2-3 lines long, very numerous 12. polyphyllus 



/Cells obscure, about 6-8 11. ; marginal band conspicuous 14. decipiens 



4\Cells clear, 10-12^; marginal band usually less marked 15 



/Ls. ligulate, long ; cells conically papillose //. serndatus 



^\Ls. oblong; cells scarcely prominent 13. adiantoides 



1. Fissidens exilis Hedw. (F. Bloxami Wi\s.) (Tab. XX. A.). 



Minute, gregarious. Stem about 1 line long, simple, pro- 

 cumbent ; leaves in 2-4 pairs, the lower very small, upper longer, 

 oblong-ligulate, at apex acute or obtusely acuminate, not bordered, 

 nerve rather thick, reaching to the apex ; sheathing laminae rather 

 short, inferior lamina gradually narrowing downwards, ceasing 

 distinctly above the insertion of the leaf ; cells pellucid, 10-12 v- 

 wide, more or less regularly hexagonal, the marginal smaller in a 

 regular series, with the transverse walls somewhat projecting so 

 that the margin is regularly crenulate, usually more strongly so 

 on the sheathing lamina. Fruit terminal. Capsule minute, erect, 

 symmetrical, elliptic, on a red seta rather long for the size of 

 the plant (2-3 lines) ; lid acutely conical-rostellate, almost or quite 

 as long as the capsule. Male flower minute, on a short radical or 

 separate stem. 



Hab. Woods and. shady banks. Not common. Fr. winter. 



