Maple blight, 169 Meadow-saffron smut, 92 Meadow-sweet brand, 67 Mealy Guelder-rose blight, 172 _Melampsora betulina_, 118 —— (Descriptions), 213 —— _salicina_, 117 Mercury rust, 110 Microscopic examination, 183 —— fungi collecting, 179 Microscopic preserving, 182 _Microsphæria Berberidis_, 170 —— (Descriptions), 219 —— _Ehrenbergii_, 171 —— _Hedwigii_, 172 Mildew and brand, 45 —— what is it?, 46 Mint brand, 58 —— rust, 102 Monthly calendar of fungi, 180 Moulds, 138 Mould, Dock, 160 —— Lettuce, 156 —— Onion, 155 —— Parsnip, 157 —— Potato, 144 —— Rose, 159 —— Spinach, 158 —— Tare, 156 Mountain-ash cluster-cups, 19 Mounting fungi, 184 Mugwort blight, 174 Mycelium, 23 Nettle cluster-cups, 14 Nightshade rust, 112 Number of species, 45 Oak-leaf rust, 111 _Oidium_, 34, 162 —— _leucoconium_, 167 —— _monilioides_, 162 —— _Tuckeri_, 164 Onion mould, 155 Oogonia, 129 Oospores, 131 Origin of mildew, 47 Parsnip mould, 157 Pea blight, 173 Pear tree cluster-cups, 18 Pea and bean rust, 114 Pearust, germination of, 40 Pennywort rust, 100 _Peridermium_, 20 —— (Descriptions), 189 _Peridium_, 4 _Perithecium_, 35 Periwinkle brand, 103 —— rust, 103 Persicaria rust, 104 _Peronospora_, 138 —— (Descriptions), 215 —— _destructor_, 156 —— _effusa_, 159 —— _gangliformis_, 156 —— _infestans_, 153 —— _macrospora_, 158 —— _nivea_, 157 —— _obliqua_, 160 —— _Schleideniana_, 155 —— _sparsa_, 159 —— _Trifoliorum_, 157 —— _Umbelliferarum_, 158 —— _Viciæ_, 156 Pepper brand, 86 _Phragmidium_, 71 _Phyllactinia_ (Descriptions), 218 —— _guttata_, 168 Pilewort rust, 115 _Podisoma_ (Descriptions), 201 _Polycystis_, 91 —— (Descriptions), 211 —— _pompholygodes_, 91 —— _Violæ_, 92 Potato disease, 144 —— mould, 142, 144 —— smut, 93 Preserving fungi, 182 _Puccinia_ (Descriptions), 196 —— _Anemones_, 60 —— _Compositarum_, 63 —— _coronata_, 57 —— _glechomatis_, 59 —— _graminis_, 25 —— _Menthæ_, 58 —— _Rosæ_, 34 —— _Saniculæ_, 64 —— _Syngenesiarum_, 62 —— _Umbelliferarum_, 64 —— _variabilis_, 62 —— _vincæ_, 103 Purslane white rust, 137