Philonotis americana 37 
" Arnelli 95 
" capillaris 37 
fontana 52, 64, 87, 88 
gracillima 94 
marchica 52 
" Muhlenbergii 11 
" tomentella 87,88 
Physcia adglutinata 78 
aquila detonsa 78 
elaeina 78 
fusca detonsa 78 
grisea 78 
hypoleuca 79 
lithotea 78 
obscura 78 
" • endochrysea. . . . 108 
" endococcina .... 78 
" virella 108 
orbicularis 78 
endococcina. . 78 
pityrea 78 
pulverulenta 79, 108 
leucoleiptes . . .79, 108 
" f. argyphae- 
oides 79 
" muscigena 79 
setosa 79 
speciosa 79, 107 
stellaris 79, 108 
aipolia 79 
" cercidia 79 
tribacia 108 
Physcomitrella patens 37 
Physcomitrellopsis africana 110 
Phycomitrium megalocarpum .... 94 
" turbinatum 10,42 
Langloisii. 37 
Physma luridum 36 
Pilophoron cereolum 6 
Pilophorus cereolus . 6 
Pilopogon Blumii 37 
Pilotrichella flexilis 90 
Pinnatella elegantissima 39 
" elimbata 94 
Kuhliana 39 
Placodium aurantiacum erythrel- 
lum 77 
" " flavovires- 
cens 77 
" cerinum sideritis 77 
" cinnabarinum 80 
vitellinum 73 
Placynthiiim nigrum 36 
Petersii 80 
Plagiochila asplenioides 46 
diffusa 28 
Smallii 28 
Plagiopus Oederi 52 
Plagiotheciopsis oblonga no 
Plagiothecium denticulatum . ... 12, 55 
var. myurum 95 
" Roeseanum 95 
" striatellum 55 
Platygrium repens 11, 15, 52 
Pleuridium alternifolium 9. 42 
" Ravenelii 94 
subulatum 9) 96 
Pleurocladia albescens 23 
Pogonatum 60 
" ' alpinum 60 
brevicaule 11 
" Klos^i no 
Pohlia cpuda 5i. 64 
nutans 10, 51, 64 
pulchella 51 
Polytrichum 60 
" alpinum 42, 88 
" angustidens 37 
" commune 11. 57, 64 
" var. ulig- 
nosum 65 
" decipiens 57 
formosum 57 
" juniperinum. . .11, 57, 65 
" ohioense ii> 57 
piliferum 57, 65 
" strictum 11, 57, 65 
Porella pinnata 42 
" platyphylla . 43 
" platyphylloidea 43 
Pottia Heimii 92-3 
" " var. behringiana. . . 93 
'\ ^ " obtusifolia 93 
" heimioides 93 
" minutula 95 
Preissia quadrata 45 
Pseudoleskeella catenulata 60 
Psilopilum tschuctschicum 19 
Pterygynandrum filiforme 52, 60 
Pterobryella papuensis no 
Pterogonium 60 
" ornithopodioides ... 60 
Pterygophyllum lucens 60 
Ptilidium ciliare 46 
Ptilium crista-castrensis 55, 65 
" pulcherrimum 47 
Ptychocoleus heterophyllus. .25, 32-33 
" torulosus 33 
Pylaisia intricata n, 52 
" polyantha 52 
" Schimperi 11, 15, 52 
" subdenticulata 52 
" velutina 11 
Pyrenula leucoplaca 2 
nitida 2 
" punctiformis . 80 
Pyxine sorediata 78 
Racomitrium, see Rhacomitrium 
Radula complanata 47 
Ramalina calicaris 76 
" " canaliculata ... 76 
" " subampliata.76, 107 
" " subfastigiata . . 76 
farinacea 76 
" fastigiata 76 
Rauia scita n, 53 
Reboulia Charrieri 95 
