Melilotus officinalis, 37. 
parviflora, 37. 
Mentha aquatica, 103. 
arvensis, 104. 
hirsuta, 103. 
piperita, 103. 
Pulegium, 104. 
rotundifolia, 103. 
rubra, 103. 
sativa, 103. 
Menyanthes trifoliata, 91. 
Mercurialis annua. 119. 
perennis, 119. 
Milium effusum, 150. 
*Mimulus luteus, 98. 
Moenchia erecta, 23. 
Molinia ccerulea, 153. 
varia, 153. 
Monotrope^e, 86. 
Monotropa hypopithys, 86. 
Montia fontana, 27. 
Myosotis arvensis, 93. 
casspitosa, 93. 
collina, 93. 
palustris, 93. 
repens, 93. 
sylvatica, 93, 
versicolor, 94. 
Myrica Gale, 120. 
Myricace^e, 120. 
Myriophyllum alterniflorum, 56. 
spicatum, 56. 
verticillatum, 56. 
Myrrhis odorata, 63. 
Naiadace/e, 137. 
*Narcissus biflorus, 129. 
*poeticus, 129. 
pseudo-narcissus, 129. 
Nardus stricta, 160. 
Narthecium ossifragum, 13 1. 
Nasturtium amphibium, n. 
officinale, 10. 
palustre, n. 
Neottia Nidus-avis, 126. 
Nepeta Cataria, 105. 
Glechoma, 105. 
Nitella flexilis, 168. 
opaca, 168. 
translucens, 168. 
Nuphar luteum, 8. 
Nymphaea alba, 8. 
Nymph,eace,e, 8. 
(Enanthe crocata, 65. 
fistulosa, 64. 
Lachenalii. 64. 
Phellandrium, 65. 
*CEnothera biennis, 58. 
Oleace^e, 89. 
Onagrarie^e, 57. 
Ononis repens, 35. 
spinosa, 35. 
Onopordon Acanthium, 78. 
Ophioglossum vulgatum, 165. 
Ophrys apifera, 128. 
Orchide^e, 126. 
Orchis incarnata, 127 
latifolia, 127. 
maculata, 128. 
•mascula, 127. 
Morio, 127. 
pyramidalis, 127. 
Origanum vulgare, 104. 
*Ornithogalum umbellatum, 131. 
*Ornithopus compressus, 40. 
perpusillus, 40. 
Orobanchace^e, ioi. 
Orobanche amethystea, 102. 
major, 101. 
minor, 101. 
Orobus tuberosus, 42. 
Osmunda regalis, 164. 
Oxalis acetosella, 32. 
*corniculata, 32. 
*Panicum Crus-galli, 148. 
*sanguinale, 148. 
Papaver Argemone, 9. 
dubium, 9. 
Rhaeas, 9. 
*somniferum, 8. 
Papaverace^e, 8. 
Parietaria officinalis, 120. 
Paris quadrifolia, 132. 
Parnassia palustris, 54. 
Pastinaca saliva , 66. 
Pedicularis palustris, 101. 
sylvatica, 101. 
Peplis Portula, 57. 
*Petasites albus, 76. 
*fragrans, 75. 
vulgaris, 76. 
Peucedanum sativum, 66. 
Phalaris arundinacea, 149. 
*canariensis, 149. 
*paradoxa, 149. 
Phegopteris Dryopteris, 164. 
polypodioides, 164. 
Phleum arenaritim, 150. 
pratense, 150. 
Phragmites communis, 153. 
Picris echioides, 80. 
Pilularia globulifera, 167. 
Pimpinella major, 63. 
Saxifraga, 63. 
Pinguicula vulgaris, 102. 
Pinus sylvestris, 124. 
Plantagine-e, 109. 
*Plantago arenaria, no. 
Coronopus, no. 
lanceolata, no. 
