RUCALYPTUS TREES. 448 
fdost favorable circumstances in tropical countries, 
would be 800- fold, and, under almost any circum- 
stances, it is the largest yielder among cereals in 
warm countries. As a fattening, saccharine green- 
fodder maize is justly appreciated. Any ergot from 
it is used, like that of rye, for medicinal purposes. 
Maize-corn contains about 75 per cent. of starch. 
Dierbach recommends mellago or treacle from maize, 
instead of that prepared from the roots of Triticum 
repens, L., and the molasses so obtained serves also 
culinary uses. 
Zingiber officinale, Roscoe. — The Ginger. India 
and China. Possibly this plant may be productive 
in the hottest parts of our colony, and give satisfac- 
tory results. The multiplication is effected by divis- 
ion of the root. For candied ginger only the young, 
succulent roots are used, which are peeled and scalded 
prior to immersion into the saccharine liquid. 
Zizania aquatica, L.* (Hydropyrum esculentum, 
Link.) — The Canada Rice. In shallow streams and 
around ponds and lakes, from Canada to Florida. 
This tall grass might be readily naturalized. Although 
its grain can be utilized for bread-corn, we would 
wish to possess the plant chiefly to obtain additional 
food of a superior kind for water-birds. 
Zizania latifolia, Hance.* (Hydropyrum latifoliam, 
Griesbach.) — The Kau-sun of China. In lakes of 
Amur, Manschuria, China, and Japan. Nearly re- 
lated to the preceding species. From Dr. Hance we 
know that the solid base of the stem forms a very 
choice vegetable, largely used in China, where this 
tall water-grass undergoes regular cultivation like the 
Trapa. 
