Very common culprit in farm animal poisonings. Found in paint, batteries, grease and used motor oil. Most common in cattle and dogs, but all animals may be affected. Symptoms include dullness, lack of coordination, blindness or convulsions.
In taxonomic terms - herb generally refers to the aboveground parts or the aerial parts (i.e., the flower, leaf, and stem). In terms of herbal medicine - herb refers to plants used in various forms or preparations, valued for their therapeutic benefits, and sold as dietary supplements in the U.S. marketplace.
Orchids that produce aerial roots are called epiphytes. In nature, these roots help the plant anchor itself to trees. Often, epiphytic orchids produce aerial roots simply because it's what they do in nature. However, if the orchid has been in its container for very long, the plant may produce aerial roots because it is pot-bound. Aerial roots do no harm to the orchid.