Mourning Bride--Unfortunate attachment.
Mulberry, Black--I will not survive you.
Mulberry, White--Wisdom.
Mushroom--Suspicion.
Musk-plant--Weakness.
Myrtle--Love faithful in absence.

Narcissus--Egotism.
Nasturtium--Patriotism.
Nettle--Cruelty; slander.
Night Blooming Cereus--Transient beauty.
Nightshade--Bitter truth.

Oak--Hospitality.
Oats--Music.
Oleander--Beware.
Olive-branch--Peace.
Orange-flower--Chastity.
Orchis--Beauty.
Osier--Frankness.
Osmunda--Dreams.

Pansy--Think of me.
Parsley--Entertainment; feasting.
Passion-flower--Religious fervor; susceptibility.
Pea, Sweet--Departure.
Peach Blossom--This heart is thine.
Peony--Anger.
Pennyroyal--Flee away.
Periwinkle--Sweet remembrances.