42 



purple. May, July. Properties aromatic, stimulant, diaphoretic. 

 Substitute for serpentaria, also for ginger. 



Aristolochia. 

 Aristolockia serpeniaria. Virginian Snake-root. Off. Thickets. 

 Flowers purple. June. Properties stimulant, tonic, diaphoretic and 

 diuretic. Antidote to the bite of poisonous snakes. 



Aristolochia si pho. L'Her. Dutchman's pipe. Woods. Flowers 

 brown. June. Prop, similar to A. serpentaria. 

 Ord.— CHENOPODIACE^. 

 Some of these plants contain an essential oil, which renders them 

 tonic, antispasmodic and anthelmintic. 

 Chenopodium. 

 Chenopodium ambrosioides. Ambrosia. Goose-foot. Off. Prai- 

 t us. Flowers green. August, Sept. Prop, tonic and anthelmintic. 

 Employed in chorea. 



Chenopodium Botrys, Oak-of-Jerusalem. Off. Sandy fields. F. 

 green. June. Prop, tonic, anthelmintic and expectorant. 



Chenopodiam anthelminticum. Wormseed. Oft'. F. green. Aug. 

 Prop, anthelmintic and tonic, 



Ord.— POLYGONACEiE. 

 The roots of some of these plants are nauseous and purgative, 

 while the leaves and stalks of others contain oxalic acid, and others 

 are farinaceous. 



Polygonum. 

 Polygonum aviculare. Bird Polygonum or Knot-grass. Fields. 

 F. reddish. May, Sept. Prop. Astringent and styptic, seeds emetic 

 and cathartic. 



Polygonum erectum. (P. aviculare. Michx.) Erect Knot-grass. 

 Fields. Flowers yellowish. June, September. Properties similar to 

 last. 



Polygonum punctatum. Ell. (P. Hydropiper. Michx.) Water 

 Pepper. Low grounds. Flowers green, August, Sept. Properties; 

 leaves acrid, pungent and vesicant, emmenagogue, diuretic. 



Polygonum pcrsicaria. Ladies' Thumb. Spotted Knot-weed* Wet 

 grounds. Flowers rose colored. June, August. Prop, similar to 

 last, astringent. 



Pylygonum I apathifolium . (P. Incarnatum. Ell.) Ditches, F. 

 white. Aug. Properties similar to the last. Used to dye yellow. 



Polygonum amplujbium. (P. coccinium. Muhl.) Amphibious 

 Knot-wttd. Marshes. F. red. Aug. Properties alterative, substi- 

 tute tor sana pari 11a. 



