120 ILLUSTRATIONS OF 
bus duplo longiore, limbo 5-lobo expansiore sub-bilabiato.—Rio 
Diamante, Prov. Mendoze Argentin.—v. s. in Herb. Hooker 
(Gillies). 
This plant is very distinct in its habit from the two former 
species, the stem being much thicker, far more flexuose and 
angular, with more distant internodes, the petiole and part of the 
blade of the leaves, together with the ripening fruit, being often 
confluent with the axils, which are much more swollen, the 
petioles in such cases becoming confluent with, and their margins 
decurrent on, the angles of the stems; the petiole is shorter and 
broader than in either of the former species. The leaves, including 
the petiole, are nine lines long, and three lines broad; and unlike 
the two former species, they are marked with distinct nerves and 
veins, which are especially prominent below. The tube of the 
calyx is short, but its border is divided into five large, broad, 
foliaceous leaflets, which are somewhat unequal in length, two of 
them being one-third of the length of the flower. The corolla is 
far more slender and infundibuliform than in the two preceding 
species, and is altogether seven lines long, the tube being quite 
glabrous, and rather ventricose above ; its border somewhat bila- 
biate, is divided into five equal, short, obtuse lobes. The stamens 
are unequal in length, the two longer ones scarcely reaching the 
middle of the tube of the corolla, and the fifth shortest is not 
declinate at the apex as the four others. The fruit, in every 
instance I have seen, becomes enclosed in the tumescent axil ; the 
tube of the calyx enlarges, and becomes converted into a hardened 
ligneous covering, which is crowned by its persistent foliaceous 
lobes : the seed in its structure differs in no way from that of the 
two preceding species.* 
The plants just described, cannot be referred satisfactorily to 
any known natural order. They resemble Nolanacee, Ehretiacea, 
Convolvulacee, and Solanacea, in their tubular corolla, with five 
included stamens, and more especially the latter in the indupli- 
* A drawing of this species is shown in Plate 26 8. 
