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 : Cin- 

 chona succirubra and magnifolia, two Hameliae (one with larger 

 flowers than I have seen in any other species), a Gonzalea, and 

 Ritbia Relboun. Of genera abundant in the plains and rarely 

 climbing the hills are Randia, Uncaria, Nonatelia, Faramea, and 

 Cephaelis. Uncaria Guianensis, 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, resembling 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 Ltidenbergia, 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 fine 

 and closely-allied species of the tribe Gardenia; 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 Sanlarem, where I could never find lkm< r-. 

 nor did I meet with it elsewhere on the Amazon. 



Loranthaceu\ i. A Loranthus, with numerous small, yellow, 

 sweet-scented flowers, growing abundantly, especially on Inga 

 trees. There are many other species, but no large-flowered ours. 



Aristolochiacece, i. Two Aristolochise jvcre 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. 



Lobeliacece-) 3. --One Centmpogon ;m<l two Siphocampyli. 

 One or two Other species of the latter genus were seen. The 

 only Lobeliarea I have seen in the plain is Cf/ifm^ii^n;i Siti-ina- 

 mensis, which I gathered at the foot of the granitic mountain 

 Imei, at the source of the river 1'acimoni. 



Valerianaceee, I. A slender twining Yaleriana. This genus, 

 absent from the plains, begins to be met with in the hills at about 



