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IN THE CINCHONA FORESTS 281
the other a beautiful arbuscle, seen only in the valley of San
Antonio, where it grows from the very plain up to 2600 feet.
The slender stems, of from 8 to 14 feet, are usually simple and
arched, and the large white flowers grow in small pendulous
corymbs from the axils of very large, elongate, glaucous leaves. . . .
Crudferce, 2. Apparently species of Sisymbrium, the one
growing near streams, the other in open situations ; both in very
small quantity. . . .
Capparidacece. The only species observed was a Cleome, a
genus which extends from the plain to a great height on the
wooded hills.
Sterculiacea. A raft-wood tree, Ochroma, is pretty abundant.
Another tree of the same order (not seen in flower) appears to be
a Chorisia.
Biittneriacea, i. A rampant Melochia. Muntingia Calaburii,
a tree found in the plains on both sides of the Cordillera, grows
abundantly by the Rio San Antonio, up to 2500 feet.
Malvacetz, 2. Four or five common weeds, whereof Sida
glomerata, Cav., is the most of this order.
plentiful, comprise all that was seen
Tiliacecc, i. A very handsome tree, with a slender straight
trunk, reaching 60 feet, very long branches, large, ligulate, serrated,
distichous leaves, and terminal panicles (sometimes 4 feet long)
of yellow flowers, scented like those of Tilia Eurofcca ; it is
abundant and ornamental about the middle region of the Red
Bark. Besides this tree, another of the same order (apparently
a Heliocarpus), growing to about 30 feet, is also frequent. .
. .
/'ii/v^(i/(.'(>\ 2. A Monnina and Palygala paniculate, L. . . .
The Polygala of the Bark woods is the common and almost the
only species of the equatorial Andes, on whose western slopes it
descends to the plain, and does not seem to ascend higher than 7000
feet on either side, nor is it abundant at any elevation. When
I recollect the abundance of Polygala ntl^aris on cold English
moors, I am struck with this paucity of Polygala; in the Andes,
and still more when I it compare with their abundance and
variety on hot savannas of the Orinoco, and in hollows of
granite rocks by the Atabapo.
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