— viii — 



Polytrichum flexicaule 91 



" gracile 23 



" juniperinum 23 



" ohioense 23 



" piliferum 23, 67 



'* Smithiae 23 



' ' strictum 23 



" subpiliferum 67 



Porella Cordaeana 85 



" pinnata 86 



' * rivularis 8.S, 86 



Porina 61 



Porotrichum allegheniense 55 



Pottia truncatula , 39 



Pseudoleskea 4g 



Pseudopy renula 61 



Psilopilum afrolaevigatum 92 



" antarcticum 70 



" laevigatum 46 



" Wageri 92 



Psora 60 



Psorotrichia 61 



Pterigynandrum filiforme 44 



" " var. minus. 44 



Ptilidiiim ciliare 2 



" pulcherrimum 2 



Pungentella scabrella 8 



Pylaisia intricata 59 



" polyantha 59 



" Schimperi 59 



" velutina 18 



Pyrenastrum 61 



Pyrenodesmia 60 



Pyrenopsis 61 



Pyrenula 61 



Pyxine 61 



Radula complanata 91 



Ramalina rigida 4 



" reticulata 24 



Raphidostegium 78 



" adnatum ■. 58 



'* carolinianum 58 



" caespitosum 92 



Rauia scita 44. 



Rhabdoweisia denticulata 24 



Rhacomitrium aciculare .5, 38 



" canescens ericoides.. 71 



" languinosum 70 



' ' microcarpum 38 



' ' sudeticum 4, 49 



Rhizocarpon Bolanderi 48 



' ' geographicum 48 



Rhizogonium salakanum 31 



Rhodobryum roseum 42, 83 



Rhynchostegium rusciforme 54 



Rhytidium rugosum 45 



Riccardia latifrons i, 2 



Rinodina 60, 61 



' ' radiata 48 



Saelenia glaucescens 24 



Sarconeuron glaciale 47 



Scapania irrigua i 



" paludicola 1,2 



Schistidium Agassizii 26 



Schistidium apocarpum 26 



Sciaromium capense 92 



Sematophyllum , 11 



" adnatum 78 



" auricomum 78 



" decipiens 8 



* ' lamprophyllum 8 



' ' scabrellum 8 



Smallii.. 76, 77 (PI. VI 

 f. 1-12), 78 



Solorina crocea 48 



Sphaerophorus globosus 37 



Sphagnum 2 



' * acutifolium 22 



" " var. rubrum 22 

 " " " versi- 

 color 22 



" " " viride. . 22 



" auriculatum 21 



" capillaceum 22 



" " var. tenel- 



lum 22 



' ' centrale 19 



" compactum 20 



* * " var. squar- 



rosum. . . 20 



" contortum 21 



" " var. tenue. . . 21 



" cymbifolium 20 



" " var. sub- 



carneum 20 

 " " " vires- 



cens. ... 20 



" fallax 21 



" fimbriatum 21 



" fuscum 5, 23 



" " var. pallescens.. 22 



" " " virescens. . . 22 



'* Garveri.. 20 



" Girgensohnii 6,22 



'* imbricatum 19,20 



" " var. affine.. 20 



" intermedium 19,21 



" inundatum 21 



" " var. squar- 



rosulum.. 21 



" magellanicum 19,20 



'* medium 19 



" " V. laeve f . pur- 



purascens. . . 19 



" palustre. 19, 20, 83 



' ' papillosum 19, 20 



" " var. inter- 



medium. . 20 



" parvifolium 21 



** quinquefarium 22 



" recurvum 21, 83 



" '* var. amblyphyl- 



lum. . . 21 

 " " " mucrona- 



tum. . . 21 



" " " tenue .... 21 



" robustum 22 



" Russowii 22 



