CINCHONA. 
283 
to the north and south of Loxa. The soil in which it thrives best, is 
generally a red clayey or rocky ground, and particularly on the 
banks of small rivers descending from the mountains,* flowering 
from May to September. The stem is of no great thickness, erect, 
round, and covered with a smooth bark, externally of a brown 
grey colour ; the younger branches are quadrangular, smooth, leafy, 
and tomentose ; the leaves are opposite, spreading, oblong-ovate,t 
about nine inches long, entire, shining on the upper surface, pubes- 
cent underneath, and stand upon purplish petioles, flat on one side, 
and roundish on the other ; the flowei-s appear in terminal leafy 
panicles, supported upon long tetragonous peduncles; the calyx is 
of a dull purple colour, downy, and five-toothed; the corolla is 
internally tomentose, white above, and purplish below ; the seg- 
ments spreading, with reflected tips ; the filaments are short, and 
support linear, bifid anthers; the germen is tomentose; the capsule 
narrow, oblong, about an inch and a half in length, of a reddish 
brown colour, and crowned with the calyx.J 
Cinchona Obion gifolia. — This tree rises to a considerable height ; 
the stem is single, round, and erect, with a smooth, brownish or ash 
coloured bark; the older branches are smooth, round, and of a rusty 
colour: the younger are obtusely four-cornered, leafy, and of a red- 
dish colour ; the leaves, when full grown, are from one to two feet 
long, of an oblong-oval shape, and stand opposite, supported upon 
semi-round petioles of a purple colour; the stipules are supra- 
axillary, interfoliaceous, opposite, contiguous, united at the base, 
and of an obovate figure ; the flowers are produced in large, erect, 
compound, terminal panicles, and are placed upon long, brachiated, 
many-flowered peduncles; the calyx is small, five-toothed, and of a 
purple colour; the corolla is white, and odorous; the filaments are 
very short, inserted into the tube of the corolla ; anthers oblong, 
bifid at the base, and situated below the middle of the tube of the 
corolla ; the capsules are large, oblong, obscurely striated, some- 
what curved, and crowned by the calyx.§ This tree is found on the 
Andes, growing in the woods on the banks of the mountain streams, 
and abundantly so at Chinchao, Riobamba, and Cuchero, flowering 
in June and July. || 
* Phil. Trans, vol. xl. p. 83. 
+ The leaves of species varies verj' much in form. 
X Fig. a. the caljx and pistillam. b. The corolla spread open. c. The style. 
d. A stamen. 
§ Flora Peruv. ii. 53, 196. 
II Fig. ft. the style, b. The corolla cut open. c. A stamen, rf. The calyx. 
