TAXONOMY 
335 
placenta. Fruit a capsule—rarely indehiscent—bursting lengthwise 
by two valves. Seeds exalbuminous. 
Official drug 
Part used 
Botanical name 
Habitat 
Sinapis Alba 
Seed 
Sinapis alba 
Europe and Asia 
Sinapis Nigra 
Unofficial drug 
Seed 
Brassica nigra 
Europe and Asia 
Semenae Rapae 
Seed 
Brassica napus 
Europe and Asia 
Fig. 194 .—Brassica nigra —Branch. {Sayre.) 
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 
