IN THE CINCHONA FORESTS 287 
saw in tolerable state, but a good many more were observed, 
on the whole about 30. Of plants peculiar to the warm and 
temperate valleys of the Andes, never descending to the plain, 
at least in this latitude, the following may be mentioned : Ci?i- 
chona siiccirubra and mag?iifolia^ two Hameliae (one with larger 
flowers than I have seen in any other species), a Gonzalea, and 
Rubia Relboim. Of genera abundant in the plains and rarely 
climbing the hills are Randia, Uncaria, Nonatelia, Faramea, and 
Cephaelis. Uncaria Guiane^tsis, a twiner with formidable aculei- 
form stipules, has a very remarkable distribution. I have thrice 
met with it on the Atlantic side of the Andes, viz. first, at Para 
near the mouth of the Amazon ; secondly, towards the head of 
the Orinoco ; and thirdly, on the hill of Lamas, in the Andes of 
Maynas. In each of these three localities, so widely separated, 
it occupies a very limited area. I again met with it about the 
lower frontier of the Bark region, and on the rivers entering the 
Gulf of Guayaquil it is so abundant as to form a serious obstruction 
to navigation, especially in the upper part of their course, where 
the current is rapid and canoes ascending the stream must neces- 
sarily keep close inshore. ... Of plants allied to Cinchona, the most 
remarkable is a fine epiphyte, resembUng Buena and Hillia in the 
large white salver-shaped odoriferous flowers. . . . There is also 
a handsome tree, growing from 4000 feet upwards, perhaps allied 
to Liidenbergia, but with a curious bilamellate crest on the apex 
of each segment of the corolla. I have previously gathered a 
congener at Tarapoto, and another on Tunguragua. Two very flne 
and closely-allied species of the tribe Gardeniae I can refer to no 
described genus. One of them has leaves of immense size, near 
a yard long, and they are aggregated at the apex of a usually 
simple stem, so as to give it the appearance of a palm. The 
moment I saw it, I recollected having observed the same or a 
very similar tree near Santarem, where I could never find flowers, 
nor did I meet with it elsewhere on the Amazon. 
LoranthacecE^ \. — A Loranthus, with numerous small, yellow, 
sweet-scented flowers, growing abundantly, especially on Inga 
trees. There are many other species, but no large-flowered ones. 
A7'istolochiacecE^ i. — -Two Aristolochi^ were seen, but in a 
barren state. A third species, scarcely referable to Aristolochia, 
was gathered with young flowers. None of the three were seen 
climbing on the Red Bark tree. 
Lodeliacece, 3. — One Centropogon and two Siphocampyli. 
One or two other species of the latter genus were seen. The 
only Lobeliacea I have seen in the plain is Centropogon Surina- 
mensis, which I gathered at the foot of the granitic mountain 
Imei, at the source of the river Pacimoni. 
Valerianacece^ i. — A slender twining Valeriana. This genus, 
absent from the plains, begins to be met with in the hills at about 
