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Nectria Fr. 49 Orthotrichum 
Lamyi De Not. 154 * appendiculatum Schpr. 38 
Nephroma * arcticum Schpr.. . . 36 
arcticum * Blyttii Schpr. vu 
f. complicatum Nyl. 128| * laevigatum Zetterst. . 36 
expallidum Nyl. . 128 * macroblepharum Schpr. 37 
Niptera Fr. * mieroblepharum Schpr. 36 
* lacustris Fr. 70 pallens Bruch 38 
Nitella * Rogeri 37 
intricata (Roth.) 108 * saxatile Wood. 38 
f. humilis * Shawii Wils. , . 36 
mucronata * Sommerfeltii Schpr. 37 
v. tenuior . 108 | Osmunda 
translucens . 108 einnamomea L. 101 
Nodulisphæria Rbnhrst. 53 Claytoniana L. 101 
Notholsena regalis 
Maranthæ R. Br. 184 6. spectabilis wind. 101 
Ochrolechia Oxymitra 
tartarea L. 148 pyramidata Bisch. 105 
Odontidium Pannaria 
alpigenum Rerner. 56 deficiens Ngl. 128 
Oedocephalum triptophylla Ach. . . 148 
* laeticolor Berk. & Br. 181 | Patellaria Fr. ex. p. 69 
Oligotrichum atrata Pr a anacin 69 
hereynicum (Ehch.) 16 Caresti@ DeM. 69 
Onoclea discolor Mont. sure: 00 
sensibilisL. H. bipinnata 100 discolor Mont. ꝙ Fr. 69 
Oomyces Berk. & Br. 49 Lecideola Tr. 69 
Opegrapha melaxantha Fr. 69 
atra Pers. 146 Rubi Lib. 71 
l. meliana Ach. 146 socialis DeN. 69 
f. hapalea Ach. . 146 xylographoides DeNot. 69 
var. Chevallieri Leight. 147 | Pediastrum 
I. heteromorpha Hepp. 147 Boryanum Menegh. 132 
var. parallela Ngl. 147 bellæa 
culmigena Lib. 147 atropurpurea LK. 100 
Epilobii Lib. 147 | Peltidium 
herbarum Mont. . 147 * Oocardii Ralchbr. . 118 
herpetica Ach. 147 | Penium 
f. fuscata Scheer. 147 margaritaceum Breb. . 160 
f, subocellata Ach. 147 | Peridermium 
f. rufescens Pers. 147 elatinum Lk.. 162 
prosodea Ach. 147 Pini Chev. 162 
rimalis Pers. . 146 | Peronospora 
saxicola Ach. 146 Filicum Rbnhrst, 198 
warla. Pers“ 146 | * obliqua Cooke 181 
f. palicaris Lightf. Pertusaria 
f. diaphora Ach. dactylina Ach. 128 
f. signata leucotera Nyl. 128 
vulgata Ach. 147|* Peziza . 7 
f. siderella Ach. Acetabulum Z. 70 
Ophiobolus 53 æruginosa Pers. 72 
Ophioglossum ardennensis Mont. 70, 140 
vulgatum Sw. 101 * ascoboloides De Not. 72 
Orthotrichum atrata Pers. v9 
anomalum v. 6. atrovirens Pers. 70 
Malilnbrg. 37 aurantia Oeder. 72 
