poisonous. Plants of the genus Veratrum, especially V. viride of North
America, yielding a toxic alkaloid used medicinally.

henbane (black henbane, insane root)
Poisonous Eurasian plant (Hyoscyamus niger) having an unpleasant odor,
sticky leaves, and funnel-shaped greenish-yellow flowers. It is a source
hyoscyamus, hyoscamine and scopolamine.

henna
Tree or shrub (Lawsonia inermis) of the Middle East, having fragrant
white or reddish flowers. Reddish-orange dyestuff prepared from the
dried and ground leaves of this plant, used as a cosmetic dye and for
coloring leather and fabrics. To dye (hair, for example) with henna.

Hepar
Liver of sulphur; a substance of a liver-brown color, sometimes used in
medicine. Fformed by fusing sulphur with carbonates of the alkalies
(esp. potassium), and consists essentially of alkaline sulphides. Called
also hepar sulphuris. A substance resembling hepar; in homeopathy,
calcium sulphide, called also hepar sulphuris calcareum.

hepatica (liverleaf)
Woodland plants of the genus Hepatica, especially H. americana of
eastern North America, having three-lobed leaves and white or lavender
flowers.

Herpes Zoster
Varicella-zoster virus: A herpesvirus that causes chickenpox and
shingles. Causes an acute viral infection--inflammation of the sensory
ganglia of spinal or cranial nerves and the eruption of vesicles along