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GREVILLEA ROBUSTA.—The Silk Oak tree of Australia; a tree that at- 
tains a large size, and is remarkable for the graceful beauty of its 
foliage. 
GRIAS CAULIFLORA.—The Anchovy Pear of Jamaica. The fruit is 
pickled and eaten like the Mango, having a similar taste. 
USER Ua OFFICINALE.—The wood of this tree is called Lignum- Vite. 
A resin, called gum guaiacum, exudes from the stem, and is otherwise 
obtained ‘ftom the wood by artificial means. It is of a greenish brown 
color, with a balsamic fragrance, and is remarkable for the changes of 
color it undergoes when brought into contact with various substances. 
Gluten gives ita blue tint ; nitric acid and chlorine change it succes- 
Sively to green, blue, and brown. The resin, as also the bark and wood, 
are used medicinally. 
GUAZUMA TOMENTOSA.—This plant is nearly allied to the Chocolate- 
Nut tree, and yields fruits that abound in mucilage, as also does the 
bark of the young shoots. The mucilage is given out in water, and has 
been used as a substitute for gelatine or albumen, in clarifying cane- 
juice in the manufacture of sugar. The timber is light, and is employed 
for the staves of sugar-hogsheads; it is known in Jamaica as Bastard 
Cedar. A strong fiber is obtained from the young shoots. 
GUILIELMA SPECIOSA.—The Peach palm of Venezuela. The fruits 
are borne in large drooping bunches, and their fleshy outer portion con- 
tains starchy matter, which forms a portion of the food of the natives. 
They are cooked and eaten with salt, and are said to resemble a potato 
in flavor. A beverage is prepared by fermenting them in water; and 
the meal obtained from them is made into bread. The wood of old trees 
is black, and so hard as to turn the edge of an ax. 
H4#EMATOXYLON CAMPECHIANUM.—The Logwood tree. This dye- 
stuff is largely used by calico-printers, and other dyeing manufacturers. 
It is also used as an ingredient in some writing-inks, and for the proper 
eoloring and crusting of port-wine. 
HARDENBERGIA MONOPHYLLA.—An Australian climbing-plant of the 
Leguminous family. The long, carrot-shaped, woody root was called, by 
the early settlers in that country, sarsaparilla, and is still used in infu- 
sion as a substitute for that root. } 
HARTIGHSEA SPECTABILIS.—A New Zealand tree, called Wahahe by 
the natives, who employ the leaves as a substitute for bops, and also 
prepare from them a spirituous infusion as a stomachic medicine. 
HELIcONIA BIHAL—A plant of the order Musacee, from South America. 
The young shoots are eaten by the natives, and the fruits are also col- 
lected and used as food. It also furnishes a usetul fiber. 
HIBISCUS ROSA SINENSIS.—The flowers of this malvaceous plant con- 
tain a quantity of astringent juice, and, when bruised, rapidly turn 
black or deep purple; they are used by the Chinese ladies for dyeing their 
hair and eyebrows, and in Java for blacking shoes. 
HIPPOMANE MANCINELLA.—This is the poisonous Manchineel tree of 
South America and other tropical regions. The virulent nature of the 
juice of this tree has given it a reputation equal to that forced upon the 
Upas tree of Java. The juice is certainly very acrid, and even its smoke, 
when burning, causes temporary blindness. The fruit is equally dan- 
gerous, and, from its beautiful appearance, is sometimes partaken of by 
those who are unaware of its deleterious properties, but its burning 
effects on the lips soon causes them to desist. Indians are said to poison 
their arrows with the juice of this tree. 
HuRA CREPITANS.—This tropical plant is known as the Sand Box 
tree. Its deep-furrowed, rounded, hard-shelled fruit is about the size of 
