162 
Hyprastis, Hydrastis Canadensis L. 
Largely used, extremely scarce and very high-priced ; difficult 
to grow and requires great care, by methods already well-defined 
by the Bureau of Plant Industry. One willing to take the neces- 
sary amount of eee Be probably make very large profits. 
alate Bu ; Yearbook, U. S. Dept. Agric. 1905: 
5343 aria te Circular 6; Bull. 107: 31). 
GINSENG, Panax quinquefolius L. 
Remarks concerning Hydrastis apply to this also. (Farmers’ 
Bull. 663: 24; Bur. Plant Industry, Bull. 107: 49; Farmers’ 
Bull. 551.) 
FRANGULA Bark, Rhamnus Frangula L. 
Can be easily grown in swamp lands, replacing aoe. 
brook-alder; bark abundant and cheap, but very liable to ad- 
mixture with other barks which are hard to distinguish. anu, 
facturers would probably welcome supplies from cultivators, 
of known quality. 
PEPPERMIN’ 1S Mentha piperiia L. and M. spicata l 
ee established in euluivation on a large scale in this 
country. (Farmers’ Bull. 663: 31 and 34; ‘Bur, Plant Industry, 
Bull. 90; 19; 219: 28 and 29.) 
Mustarp, Sinapis alba L. and Brassica nigra (L.) Koch. 
European supplies so abundant and cheap that cultivation 
here is a matter of close competition, but there is no goo 
why it should not succeed. (Bull. U. S. Dept. Agric. a 6. 
and 7.) 
STRAMONIUM, Datura Stramonium L. 
rows readily in wastelands, on ash dumps and in similar 
8. Appl. 
108: cea os 663: 35; ke U.S. Dept. Agric. 1905: 
