Plants used for retained placenta Horses with retained placenta were seen to have a black discharge three days post partum. These horses were given a 7.5 cm piece of aloes (Aloe vera) each day for three days, and then purged with castor oil (Ricinus communis). One respondent used linseed oil mixed with aloe vera gel twice weekly. About half of a large leaf of Aloe vera was used. Another respondent used pounded turmeric rhizome (Curcuma longa). Turmeric was said to flush out the uterus. Horses were also given molasses water to drink, this was said to "clean them out." Horses were also given a combination of glycerine, Epsom salts and rachette (Nopalea cochenillifera) to treat inflammation.