136 ILLUSTRATIONS OF 
quarter long, and five lines wide, they are of a bright green colour, 
somewhat thick and fleshy, smooth on both sides, and above are 
quite polished ; the peduncles are half an inch long, the calyx is 
two lines, the corolla, including the lobes of the border, is from 
six to eight lines in length.* 
DUNALIA. 
On a preceding occasion p. 13, I offered an amended cha- 
racter of this genus, founded upon the observations made upon 
a new species very remarkable in its habit, which is there 
described (p. 14), and figured in Plate 2. Since then, in the 
fine herbarium of Sir William Hooker, which is enriched with 
the collections of almost every South American traveller, I have 
seen a specimen of the typical species, D. Solanacea, H.B.K. 
of which an excellent figure is given by Professor Kunth in the 
Nov. Gen. et Sp. tab. 194; but in this instance, the whole 
plant is not almost glabrous, as is there represented: on the 
contrary, the stem, the petiole, and the under side of the leaves, 
are covered with stellate tomentum, which is also seen in the 
hervures of their upper surface; the flowers, in like manner, are 
densely clothed with similar tomentum. I find, too, that the tube 
of the corolla is not so slender, nor is the border so deeply cleft 
as there shown, being more sinuated with shorter and more obtuse 
lobes, approaching more the form seen in D, Lyecioides (loc. cit.) 
The difference in habit of these two species is very remarkable, 
and from their external appearance, in one case, the peculiar 
pubescence, its large leaves, its spineless branches, its dense fascicle 
of flowers, offer so great a contrast to the general habit of the 
other, that no one would pronounce them to belong to the same 
_ genus. I have now to add three new species, two very spinose, 
from Bolivia, and one, almost spineless, from Mexico, the latter 
being remarkable for the greater size of its corolla. It might, 
indeed, be easily mistaken for a species of Tochroma, were it not 
for its appendiculate filaments and smaller calyx. 
* This species, with sectional details, is shown in Plate 29, 
