Smatterings from _Handbook of Poisoning_ (Doesn't that sound like something
used by Boris and Natasha?), 11 edition, by Dreisbach, pg. 541-556 (Ferrets
may differ in being affected by some other things.): akee, castor bean and
jequirity bean, fava beans if favaism present, hemlock, an assortment of
fungi, calla lily, elephant ear, jack in the pulpit, other arum family
members, oleander, poke weed, rhubarb leaves, nightshade, jerusalem cherry,
green potato sprouts, some other solanaceae members, yew, croton oil,
foxglove, henbane, jimsonweed, larkspur, meadow saffrom (colchicum -- a
popular flowering plant for this time of year), monkshood, poison ivy,
poison oak, poison sumac, false hellebore, baneberry, betelnut seeds, bird
of paradise seed pods, bleeding heart, bloodroot, boxwood leaves and twigs,
buckeye seed, horsechestnut seed, burning bush fruit and leaves, spindle
tree fruit and leaves, calabar bean, celedine, cherry seed and leaves
(another source includes the bark), china berry fruit and leaves,
chrysanthemum (though I know there is a Chinese variety used for food and my
favorite tea, the source says there is a resin which can cause dermatitis),
corn cockle seeds, crowfoot, christmas rose, marsh marigold, buttercups and
other ranunculus, daffodil bulbs, daphne, finger cherry fruit, glory lily,
elderberry, holly berries, hyacinth bulbs, hydrangea, indian tobacco
(lobelia), iris roots, jessamine (Gelsemium sempervirens), jetberry berries,
jute stem, laburnum, golden chain, kentucky coffee bean, lantana, laurel,
lily of the valley, locust seeds, lupin, lupine, manchineel, mago fruit skin
and tree sap, mexican poppy leaves and seeds, mistletoe, moonseed fruit,
nutmeg seeds (?  Don't ask me?), physic nut seed, poinsettia (though this is
mild compared with some of the others -- basically gastroenteritis or
dermatitis), primrose, privet, rayless goldenrod, snakeroot, rhododenron,
sweet pea, tung nut seed, wisteria, yellow oleander.
 
There, now folks wondering about their plants can look them up.  Whew!
 
[P.S.]
Oh, arum includes dieffenbachia, caladium, alocasia, colocasia,
philodendron, and arisaema with all parts dangerous as well.
[Posted in FML issue 2138]