302 FOREST CULTURE AND 
of its leaves, which pass under the names of Spadic 
and Coca, They contain two alkaloids, cocain and 
hygrin, also a peculiar tannic acid. . Whether any of 
the many other species of erythroxylon possess simi- 
lar- properties seems never yet to have been ascer- 
tained. 
Kupatorium triplinerve, Vahl. (KE. Ayapana, Ven- 
tenat.)—Central America. A perennial, somewhat 
shrubby herb, possibly hardy in the warmer parts of 
our colony. It is used as a medicinal plant, also as 
an alexipharmic. It contains eupatorin and much 
essential oil, peculiar to the plant. 
Fagopyrum cymosum, Meissner. — The perennial 
Buckwheat or rather Beechwheat of-the Indian 
and Chinese Highlands. 
Fagopyrum emarginatum, Babington. — Chinese 
and Himalayan mountains, where it is cultivated for 
its seeds. Annual. 
Fagopyrum esculentum, Moench.—Central Asia. 
The ordinary Buckwheat. This annual herb succeeds 
on the poorest soil. The crushed amylaceous seeds 
can be converted by boiling or baking into a palatable 
and wholesome food. As an agrarian plant it can, 
with advantage, be raised as a first crop on sandy 
heath-land, newly broken up, for green manure. The 
period required for the cyclus of its vegetation is ex- 
tremely short. Thusitcan be reared on our higher 
Alps. 
Fagopyrum Tataricum, Moench.—Middle and North 
Asia. Yields for the higher mountain regions a still 
safer crop than the foregoing ; otherwise the remarks 
offered in reference to F, esculentum apply also to T. 
Tataricum, 
