TAXONOMY 
335 
merits expanded; pistil bicarpellate; ovary two-celled, superior, often 
surrounded by a nectar girdle; style filiform with bilobed or bifid 
stigma. Fruit usually a capsule ( Exogonium , etc.), dehiscing septi- 
fragally, rarely a berry. Seeds scantily albuminous to exalbuminous. 
Official drug 
Jalapa 
Part used 
Tuberous root 
Scammoniae Radix Root 
Unofficial 
Male Jalap Root 
Tampico Jalap Root 
Wild Jalap Root 
Turpeth Root Root 
Botanical origin 
Exogonium Purga 
Convolvulus 
Scammonia 
Habitat 
Mexico 
1 Asia Minor, 
j Greece, Syria 
Ipomcea orizabensis Mexico 
Ipomoea simulans Mexico 
Ipomoea pandurata United States 
Operculina Turpethum East Indies 
