Contractions. - Rhus-ven. Rs-v.

Nat. ord., Anacaediaceae.

Synonym. - Rhus Vernix.

Fig. - Bigelow, Amer. Med. Bot., pl. 10, described as Rhus Vernix.

Poison Sumach, Poison Elder, Varnish Tree.

Habitat. - In swamps. Canada and Northern States, Georgia, Louisiana, and Japan.

Flowering time. - June.

Parts employed. - Young shoots, or the milky juice which exudes from incisions in the bark.

Characters. - A shrub, 8 to 15 feet high, very poisonous to the touch with most persons. Leaves pinnate, with from 3 to 6 pairs of opposite leaflets besides the terminal one, often slightly pubescent beneath. Flowers greenish, mostly dioecious, small. Drupe as large as a pea, not broader than long, compressed. Cotyledons oval, rather thick, and fleshy.

Time for collecting. - June to August. It should, like Rhus toxicodendron, be collected at sunset.

Preparation. - Tincture, corresponding in alcoholic strength with 40 O.P. spirit.

N.B. - As the plant is not indigenous to this country, the tincture imported from North America must be used.

Reference to Horn. Proving. - Jahr's Symptomen Codex, Hempel's Translation. N. A. Journ. Horn., vols. vii. and xiii.

Proper forms for dispensing. -φ and upwards, Tincture, Pilules, or Globules.