The vegetation of the thickets in these _pajonales_ consists of _palms_, _tree-ferns_, _Melastomaceæ_ (_Lasiandra fontanesiana_) with bright showy flowers, exceedingly pretty _Ericaceæ_ (_Gaultheriæ_), _Vacciniæ_, the _huaturu_ or incense-tree in great quantities, and _Chinchonæ_, chiefly consisting of _C. Caravayensis_ (Wedd.), with a few plants of _Calisaya Josephiana_, but the latter are much more rare here than in the neighbourhood of Paccay-samana. The _C. Caravayensis_, a worthless species, has panicles of beautiful deep roseate flowers, large coarse hairy capsules, and lanceolate leaves, above smooth with purple veins, and hairy on the under side. It can probably bear greater cold than any other chinchona.[327] The afternoon was passed in searching for plants of the shrubby _Calisaya_, but with little success. During our examination of the thickets we found a single specimen, evidently belonging to the _Calisaya_ species, but in the form of a tree, and not of a shrub. Its height was eighteen feet six inches; its girth, two feet from the ground, eight and a half inches; and the position in which it was growing was 5680 feet above the level of the sea. I was uncertain whether it belonged to the tree variety (_Calisaya vera_, Wedd.), or to the shrub (_Calisaga Josephiana_); for Dr. Weddell only gives the height of the latter at eight or ten feet. Near the banks of one of the black pools, overhung by spreading branches, we found a shed, a roof of coarse grass raised on four sticks four and a half feet high, and here we encamped for the night. It had been made by some party of incense-collectors from Bolivia, who wander through these wilds. Towards sunset it began to pour with rain, and continued through the night.