INDEX TO THE 
Maple, while . 185 
Maple, soft . .185 
Maple, ash-leaved . 185 
Mountain-tea . . 194 
Mouse-ear Chickweed, 
common or broad-leaved 215 
Mouse-ear Chickweed, 
narrow-leaved . 215 
Mouse-ear Chickweed, 
least . . 215 
Mouse-ear Chickweed, 
clammy or lon.ff pedun- 
cled . ,216 
Mouse-ear Chickweed, 
large-flowered . 216 
N. 
Neck-weed . . 6 
Nodding Fescue-gi’ass 67 
Nightshade, enchanter’s 16 
Nightshade, woody 109 
Nightshade, deadly 109 
New-Jersey Tea . 127 
Nettle-tree, American 151 
Naked-cymed Mealy-tree 152 
Naked-stemmed Sarsapa- 
rilla . . 156 
Nodding Lizard’ s-tail 177 
Nine-bark . . 229 
Norway Cinquefoil . 236 
O. 
Oak-leaved Water-hore- 
hound . . 12 
Obtuse-flowered Hair-grass 57 
Orchard-grass . 68 
Officinal Hound’s-tongue 102 
(Enothera, shrubby 182 
CEnothera, scollop-leaved 182 
Opposite-leaved Golden 
Saxifrage . . 185 
Oval-leaved Andromeda 198 
Officinal Soap-wort . 209 
Oval-leaved Star- wort . 212 
P. 
Privit, Prim, Print. . 4 
Paul’s Betony . 5 
Pennyroyal . . 13 
Panicum, cock’s-foot 47 
Panic-grass, water . 48 
Panic-grass, tw^o-edged 48 
Purple Crab -grass . 52 
Paspalum, slender . 52 
Purple Beard-grass . 55 
Pond Dogwood . 80 
Partridge -berry . 85 
Plantane, common great 88 
Plantane, Virginian . 89 
Panicled-flowered Andrew- 
sia . . 89 
Pole-cat-weed . . 92 
Pond-weed, furrow-leaved 96 
Pond-weed, different- 
leaved . . 96 
Purshia, hispid . 103 
Pimpernel, scarlet . 106 
Potatoe-vine, wild 107 
Phlox, spotted-stemmed 107 
Pink, ground . . 108 
Pink, wild . . 108 
Pennsylvania Winter- 
cherry . . ^110 
Pointed-leaved Bell-wort 114 
Perfoliate Fever-root 115 
Pale-flowered Touch-me- 
not . . 119 
Poke -leaved Milk-weed 132 
Pleiiriay-root . . 134 
Pennywort, American 137 
Pennywort, umbelled 137 
Parsnip, cow . . 139 
Parsnip, wild . . 140 
Procumbent Chervil 145 
Plumb-leaved Mealy-tree 152 
Pear-leaved Mealy-tree 152 
Poison Shumach . 154 
Poisonous Elder . .154 
Poison Oak . . 154 
Poison Vine . . 154 
Pigeon-weed . . 156 
Pontederia, heart-leaved 163 
Pickerel-weed . 163 
Philadelphia Lily . 165 
Perfoliate Bell-wort . 167 
Plantane, water . 177 
Polygonum, flax-leaved 187 
Pennsylvania Knot-weed 187 
Persicaria, tall . 188 
Partridge-berry . 194 
Pippsissewa . . 203 
Pippsissewa, spotted- 
leaved . . 204 
Pippsissewa, poison 204 
Poison Pippsissewa 204 
