and grows 60 to 80 feet high.

172. DORSTENIA CONTRAYERVA.--A plant from tropical America, the roots
of which are used in medicine under the name of Contrayerva root.

173. DRACAENA DRACO.--The Dragon's Blood tree of Teneriffe. This
liliaceous plant attains a great age and enormous size. The resin
obtained from this tree has been found in the sepulchral caves of
the Cuanches, and hence it is supposed to have been used by them
in embalming the dead. Trees of this species, at present in
vigorous health, are supposed to be as old as the pyramids of
Egypt.

174. DRACAENOPSIS AUSTRALIS.--Ti or cabbage tree of New Zealand. The
whole of this plant is fibrous and has been used for paper making.
The juice of the roots and stem contains a small amount of sugar
and has been used for producing alcohol.

175. DRIMYS WINTERI.--This plant belongs to the magnolia family and
furnishes the aromatic tonic known as Winter's bark. It is a
native of Chili and the Strait of Magalhaens.

176. DRYOBALANOPS AROMATICA.--A native of the Island of Sumatra. It
furnishes a liquid called camphor oil and a crystalline solid
known as Sumatra or Borneo camphor. Camphor oil is obtained from
incisions in the tree, and has a fragrant, aromatic odor. It has
been used for scenting soap. The solid camphor is found in cracks
of the wood, and is obtained by cutting down the tree, dividing it
into blocks and small pieces, from the interstices of which the
camphor is extracted. It differs from the ordinary camphor in
being more brittle and not condensing on the sides of the bottle
in which it is kept. It is much esteemed by the Chinese, who
attribute many virtues to it. It has been long known and is
mentioned by Marco Polo in the thirteenth century.

177. DUBOISIA HOPWOODII.--The leaves of this Australian plant are
chewed by the natives of Central Australia, just as the Peruvians
and Chilians masticate the leaves of the _Erythroxylon coca_, to
invigorate themselves during their long foot journeys through the
country. They are known as Pitury leaves.

178. DURIO ZIBETHINUS.--A common tree in the Malayan Islands, where its
fruit forms a great part of the food of the natives. It is said to
have a most delicious flavor combined with a most offensive odor,
but when once the re