CHAP, v.] THE GENUS COFFEA. 98 



is two-celled, but it differs from that of the 

 coffee in retaining the lobes of the calyx, which 

 form a sort of crown. There are many kinds 

 of Ixora, all stove shrubs, and all conspicuous 

 for their large heads or rather corymbs of showy 

 flowers. The genus Pavetta has been divided 

 from Ixora, principally because the species com- 

 posing it have the style projecting considerably 

 beyond the corolla, instead of only just appear- 

 ing above it. 



The drug called Ipecacuanha is the produce 

 of two plants belonging to this order, Cephcelis 

 Ipecacuanha and Rlchardsonia scabra ; though a 

 spurious kind is made from the roots of three 

 species of Viola, all natives of South America, 

 and a still inferior one from the roots of a kind 

 of Euphorbia, a native of Virginia and Carolina. 

 It is important to know this, as the best kinds 

 possess tonic properties as well as emetic ones, 

 while the inferior kinds are only emetics, and 

 they are very injurious if taken frequently. 

 The best brown Ipecacuanha is the powdered 

 root of CephcBlis Ipecacuanha ; a plant with small 

 white flowers collected into a globose head, 

 which is shrouded in an involucre closely re- 

 sembling a common calyx. The true calyx to 

 each separate flower is small and roundish, with 

 a very short five-toothed limb. The corolla is 

 funnel-shaped, with five small bluntish lobes. 



