TAXONOMY 283 
placenta. Fruit a capsule — rarely indehiscent — bursting lengthwise 
by two valves. Seeds exalbuminous. 
Official drug 
Sinapis Alba 
Sinapis Nigra 
Unofficial drug 
Semen Rapa; 
Part used 
Seed 
Seed 
Botanical name 
Sinapis alba 
Brassica nigra 
Habitat 
Europe and Asia 
Europe and Asia 
Seed 
Brassica napus Europe and Asia 
XIII. Order Sarraceniales. — Droseracece or Sundew Family . — 
Herbs ( Drosera , Dionaea, etc.) rarely shrubs ( Roridula of South 
Africa) growing in bogs or swamps or purely aquatic in habit 
(Aldrovanda) . Leaves, either rosettes or more or less scattered in 
alternate fashion over stem, usually glandular-hairy or sensitive- 
hairy and insectivorous. Inflorescence a loose raceme or cymose 
