IN THE CINCHONA FORESTS 285 



at the same elevation (3000 feet), and these are the lowest points 

 at which I have observed any Rosaceae near the equator ; although 

 plants of this order, especially of the tribe Sanguisorbeae, con- 

 stitute a considerable proportion of the vegetation of the open 

 highlands. 



Hydrangeacea, i. A Cornidia. The same, or a very similar 

 species, of this truly Andine genus grows by the Pastasa, on the 

 eastern side of the Cordillera, at about 4000 feet, and other three 

 species were gathered on Mount Campana, in Maynas, at 3000 

 feet. I have never seen any Cornidia either above or below the 

 warm region. 



Ciuwniacete. A pinnate-leaved Weinmannia, sometimes reach- 

 ing 80 feet high, is very frequent, and extends down the banks of 

 the Chasuan to perhaps 2200 feet. A humbler species descends 

 nearly as low on the Andes of Maynas. On the wooded de- 

 clivity of the volcano Tunguragua, Weinmanniae constitute a con- 

 siderable proportion of the vegetation, and extend upwards to at 

 least 11,000 feet. 



Lythmcece. A Cuphea, a small, weak, much-branched under- 

 shrub, with purple flowers, grows gregariously in the pastures, gener- 

 ally accompanied by Sida glomerata and a Stachytarpheta. By the 

 Rio San Antonio grow other two Cupheae, one of which grows also 

 in the valley of Alausf. This genus, abundant in the plains on 

 both sides of the Cordillera, spreads up the hills to 7000 feet, or 

 through the region of the Red Bark, but scarcely up to that of 

 the Hill Barks. Adenaria piirpiirata grows by the Rio San 

 Antonio up to 2500 feet, and descends on its banks into the 

 plain, the same as it does by streams on the eastern side of the 

 Cordillera. 



Onagraceie, i. Three species of Jussisea grow by the Rio San 

 Antonio. In the warm and hot regions this genus takes the place 

 of (Enothera, which is frequent in the hills, but rarely descends 

 below 6000 feet. In other parts of South America, as for instance 

 along the coast of Chili, Jussiita; arc found inhabiting a cool 

 climate. A single plant of a large-flowered Fuchsia was gathered 

 at about 2700 feet. A similar species occurs very rarely on the 

 eastern side of the Cordillera, at a little higher elevation. These 

 are the only instances I know of Fuchsias descending so low, 

 their favourite climate being found in the temperate and cool 

 regions of the Andes, say from 6000 to 1 1,000 feet. 



Mclu$tomace<e, 9. The first plant which took my attention at 

 Limon, after the Cinchona, was a beautiful epiphytal Blakea, grav- 

 ing from 12 to 18 feet high, with broad coriaceous leaves and 

 large rose-coloured flowers, from which features, and from its 

 often sitting high up the trees, it has almost the aspect of a 

 Clusia. At the base of each flower is a turgid involucre, of 

 four large, orbicular, widely and closely imbricated leaves, within 



