ap."

_Monotropeae_, 210.

Moon-seed, 188; Fig. 101.

Moosewood, 206; Fig. 113.

_Morchella_. See "Morel."

Morel, 73.

Morning-glory, 171, 213; Fig. 118.

Morphology, 3.

Moss, 5, 86.
true, 93.
common. See "_Bryaceae_."
peat. See "_Sphagnaceae_."

Moth, 229.

Mould, black. See "_Mucorini_."
blue. See "_Penicillium_."
herbarium. See "_Eurotium_."
insect. See "_Entomophthoreae_."
water. See "_Saprolegnia_."

Mountain-fringe, 192.

Mountain-laurel, 210; Fig. 116.

_Mucor_, 55.
mucedo, 56; Fig. 32.

_Mucor stolonifer_, 55-56.
general structure, 55.
structure of filaments, 55.
spore cases, 55.
sexual spores, 56.

_Mucorini_, 54.

Mulberry, 183.

Mullein, 217; Fig. 120.

_Musa_, _-aceae_. See "Banana."

_Musci_. See "True mosses."

Mushroom, 82.

Mustard, 192.

_Mycomycetes_. See "True fungi."

_Myosotis_. See "Forget-me-not."

_Myristica_, _-ineae_. See "Nutmeg."

_Myrtiflorae_, 205.

Myrtle, 205, 206.

_Myrtus_. See "Myrtle."

_Myxomycetes_. See "Slime-mould."

_Naias_. See "Pond-weed."

_Naiadeae_, 159.

Narcissus, 146.

Nasturtium, 197, 227.

_Navicula_, 42; Fig. 24.

Nectar, 225.

Nectary, 186.

Nelumbo, 189, 190; Fig. 101.

_Nelumbieae_, 190.

_Nemophila_, 214.

_Nepenthes_, _-eae_. See "Pitcher plant."

_Nesaea_, 206.

Nettle. See "_Urticinae_."

_Nicotiana_. See "Tobacco."

Night-blooming cereus, 204.

Nightshade, 215; Fig. 119.

_Nitella_, 40.

_Nitelleae_, 40.

Node, 39.

Nucleus, 7, 31, 231.

Nuclear division, 7, 31, 231; Figs. 127, 128.

Nucleolus, 7, 231.

Nutmeg, 188.

_Nyctagineae_, 183.

_Nymphaea_, 189; Fig. 101.

_Nymphaeaceae_, 190.

Oak, 183, 225; Fig. 97.

_OEdogonium_, 26-28; Fig. 16.
reproduction, 27.
fertilization, 28.
resting spores, 28.

_OEnothera_. See "Evening primrose."

Oil-channel, 202.

_Oleaceae_. See "Olive."

Oleander, 219.

Olive, 218.

_Onagraceae_, 206.

_Onoclea_, 104; Fig. 70.

Ooegonium, 27, 36, 39, 45, 59, 62.

Ooephyte, 109.

Opium--opium poppy, 191.

_Ophioglosseae_. See "Adder-tongue."

_Ophioglossum_, 116.

_Opuntia_. See "Prickly pear."

_Opuntieae_, 203.

Orange, 198.

Orchid, 164, 166, 227; Figs. 89, 90.

_Orchideae_, 164.

_Orchis_, 227; Fig. 89.

Organic bodies, 1.

Origanum oil, 234.

_Oscillaria_, 15, 16; Fig. 6.
movements, 15.
color, 16.
structure and reproduction, 16.

_Osmunda_. See "Flowering-f