[332] Not, of course, the famous gold-bearing river of the same name.
[333] Carhua-carhua-blanca (Lasionema ?) Tree.—30 or 40 feet high, growing in moist parts of the valley of Tambopata.
Leaves.—Opposite, entire, petiolate, oblong, acute, smooth on both sides, dark green above, lighter beneath, with veins and midrib nearly white. 2½ feet long by 9 or 10 inches broad. Coarse, bulging, and wrinkled between the veins.
Calyx.—Deep purple and green, leathery, 5-toothed, teeth rounded.
Corolla.—Tube white, tinged with light purple, leathery, 5 laciniæ, smooth and reflexed.
Stamens.—5, attached to the middle of the tube of the corolla, exserted. Filaments pillose at the base, tinged with purple. Anthers a little shorter than the filaments, all lying on the lower sides of the tube of the corolla, light brown.
Style.—Exserted, but a little shorter than the stamens, light green colour. Stigma, bi-cleft.
Panicles.—Corymbose and multiflor, in threes, 6 to 15 buds on each. Pedicels a brownish purple.
I have attempted to describe this tree, because I have been unable to identify it with any of the chinchonaceous plants in Dr. Weddell's work.
[334] Yana, in Quichua, is black; and mayu a river.