122 MISSOURI BOTANICAL GARDEN BULLETIN 
Cypripedium pubescens, yellow lady’s-slipper. 
The roots of this plant have been held in high esteem in allevi- 
ating nervous symptoms, and are said to have proved very useful 
in hysteria. 
Datura Stramonium, jimson-weed. 
Datura Tatula, purple jimson-weed. 
The effect of these plants is very similar to that of belladonna. 
In overdoses it causes nausea, delirium, drowsiness, cold sweats, 
and convulsions, : 
Delphinium Ajacis, larkspur. 
A decoction of the flowers has been used for affections of the 
eye. Tincture of the seed has been recommended as a vermifuge, 
also for the destruction of lice in the hair. The plant was for- 
merly of some repute as a medical agent in various diseases. 
Dicentra canadensis, squirrel corn. 
The roots are diuretic, diaphoretic, and sedative. The plant is 
sometimes used as a substitute for mercury in venereal diseases. 
Dioscorea villosa, wild yam. 
A tincture of the roots is used as an expectorant and diaphoretic, 
and a decoction of the root is said to be beneficial in bilious colic. 
Echinacea angustifolia, narrow-leaved purple cone-flower, 
An extract from the root of this plant was used hypodermically in 
extreme cases of blood poisoning, also externally for cuts and sores. 
Equisetum hyemale, horsetail. 
This plant is diuretic, astringent, and tonic. 
Erechtites hieracifolia, fire-weed.- ; 
The flowering tops yield a volatile oil which is said to be tonic, 
astringent, and alterative, and to exert a special influence upon 
the mucous surfaces. It has been used as a remedy for dysentery. 
Erigeron canadensis, Canada flea-bane. 
The whole plant, administered as a decoction, was used as an 
effective diuretic in diseases of the bladder and kidneys, also in 
dropsy. 
Eupatorium perfoliatum, boneset. 
Boneset was known to the Indians, by whom it was much 
esteemed in the dispersal of fevers. It also became a favorite 
remedy of the early settlers. Many properties have been attributed 
to this plant, and if true, it would be a curative for nearly all 
diseases. 
Eupatorium purpureum, gravel-root. 
As its common name indicates, this plant has been much used in 
diseases of the kidney and, bladder. 
