Erigeron canadensis is now called Conyza canadensis. It is an annual plant native throughout most of North America and Central America.
Common names include horseweed, Canadian horseweed, Canadian fleabane, coltstail, marestail and butterweed.
Black eye. Bruises. Cough. Dysuria. Gleet. Gonorrhœa. Hæmatocele. Hæmorrhages. Hæmorrhoids. Placenta prævia. Proctalgia. Spermatorrhœa. Wounds.
Hæmorrhages are caused and cured by this remedy. Persistent hæmorrhage from the bladder. Hæmorrhage from the uterus, with painful micturition. Profuse bright-red blood. Pain in left ovary and hip. Chronic gonorrhœa, with burning micturition; continual dribbling. Dysentery, with soreness and burning in bladder. Tympanites.
Erigeron is chiefly known as a remedy for hæmorrhages and congestions in pretty well all parts of the body. Its characteristic hæmorrhages are bright red. The Indians use it as an application to wounds. It compares as a vulnerary with Arnica. It has been proved by Burt and others. The throat and genito-urinary organs are specifically affected. Sensation as if something had lodged in upper part of œsophagus. Pains in umbilical region were very prominent. Feeling as if anus had been torn. Urination is painful or suppressed; sharp stinging pains in region of left kidney. Gonorrhœa and gleet have been cured by Erig. Wilmot Moore has given it with success in three cases of placenta prævia. He gave the 1x trituration (of what part of the plant is not mentioned) on the tongue. Rest >; every movement < flow; = bloody lochia to return. Rainy weather < all symptoms. Metrorrhagia, with violent irritation of rectum and bladder, and prolapsus uteri. Bright-red flow. Menorrhagia; profuse leucorrhœa; bloody lochia returns after least motion, comes in gushes; between periods, leucorrhœa with urinary irritation; pregnant women with "weak uterus;" a bloody discharge on slight exertion. Bleeding hæmorrhoids; nosebleed instead of menses (Bry).