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On the 24th of July, I made an excursion for a single day 
to Huayllay. Behind the town, large masses of Trachyte are 
piled on the face of the hill, and in the little sheltered spots 
between them, a luxuriant vegetation discovers itself, and 
many plants are found there that do not appear in more 
exposed situations, even where the elevation is much less. 
There were several fine ferns, and I gathered, besides, Lyco- 
podium crassum, Rubia hirta, Baccharis genistelloides and 
B. thyoides, Culcitium canescens, a new Alstreemeria, a species 
of Atropa, and a large yellow-flowered Gentian. There were 
likewise a few stunted shrubs, without flowers or fruit. All 
these occurred nearly on the same spot; and I have no 
doubt that a traveller, passing through Huayllay, who could 
devote a day or two to exploring the hills near the town, 
would find a great number of species, especially of ferns. I 
also procured at Huayllay, the fruit of the woolly Cactus 
before alluded to, which appears every where, from the pass 
of La Viuda to Pasco; it is eaten by the Indians, who call 
the plant Huacura. The fruit of Alstremeria dulcis is sought 
after by the children, on account of a sweet gelatinous 
pulp, resembling that of the pomegranate, in which its seeds 
are imbedded; the plant is called Campanillas coloradas, 
(red bells,) to distinguish it from the Atropa, found in the 
same places, to which they give the name of Campanillas 
amarillas, (yellow bells.) Among the ferns is an Acrostichum, 
which at Huayllay is called Calaguala; but the same name 
is given indifferently to many ferns used as substitutes for 
the genuine Polypodium Calaguala. | 
On the 28th of August, I set out on my return to Lima, 
where I arrived on the 2d of September. Above Culluay; 
I gathered Calceolaria lobata, and below that town, several 
other species were loaded with flowers. Among other plants 
that had flowered since June, were Tacsonia trifoliata, and 
pd omes of Clematis. On approaching Obrajillo, every 
thing was dried up, and from thence to the coast, there was 
CL plant in flower. 
S the season advanced, I had an rtunity of observing 
the rapidity with which vegetation iin veré the mist 
