268 
Golden Seal or Hydrastis Rhizome (Hydrastis canadensis, L.). 
= ei America. 
ant is sometimes grown for commercial purposes in the 
ace iste but its éeitiowinn might be extended. 
Henbane (Hyoscyamus niger, L.). 
Britiso.—British Isles. Foreran Beale Russia, 
Austria 
The ice are the important part of the plant. English-grown 
leaves after drying are usually worth from 3/- to 6/- per Ib. 
More might be grown in the British Isles. 
Ipecacuanha ‘Root (Psychotria Ipecacuanha, Stokes). 
Brittsn.—India, Malay States. Forer1agn.—Brazil. 
It would probably pay to grow this plant more extensively in 
British Colonies. In December, 1915, Matto Grosso root was 
valued at 24/- per lb. and Johore root at 20/- -perlb. At the same 
time Cartagena root (P. acuminata, Benth. ?) sold for 16/- per lb. 
Jalap (Ipomoea Purga, Hayne). The tubers. 
Forreran.—Vera Cruz. 
ee p reenas Schimperi, Engl., and other spp.)- 
Gum-res 
Boi Arabia. 
The best grades sold in February, 1916, for 60/- to 62/6 
per cwt. 
Nux-vomica (Strychnos Nua-vomica, Ti). 
Britisn.—India, Burma, Ceylon. 
In December, 1915, the seeds were valued at 22/6 per cwt. 
An “orl 0 On various species of Str pede “ to be found in 
&.B. 19%1, - 881. See also K.B. 1917, p. 
Ajowan Oil. See Essential Oils. 
Oil of Cade (Juniperus Oxycedrus, L.). - 
Foreicn.—South France. 
Opium (Papaver somniferum, L.). 
Britisu.—Kgypt, India. Forrran.—Asia Minor, Persia. 
Rhubarb (Rheum officinale, Baill., and other spp.). The dried 
root, 
- Brrtisu.—British ee Foreten.—North-West China, 
Tibet 
* 
