JALAP, a cathartic drug consisting of the tuberous roots of Ipomaea Purga, a convolvulaceous plant growing on the eastern declivities of the Mexican Andes at an elevation of 5000 to 8000 ft.
It is closely related to the Manioc, cassava or tapioca plant (Manihot utilissima) which it resembles when young and exhibits a similar tuberous root system.
Beautiful plants with fleshy tuberous roots, which are the better if not often disturbed.
Among tuberous vegetables the potato comes first.
Interesting and elegant plants, mostly tuberous, growing in good garden soil.