60 SOUTH AMERICAN BOTANY. 
not be forgotten, however, that the hooded portion of the upper 
lip of Cyphocarpus, more or less partakes of this character. In 
regard to æstivation, the approach to the Zobeliaceæ and the 
Campanulacea, is equally evident, in which latter family, although 
replicately valvate in Specularia Se it is more generally plicately 
valvate, as in Campanula (73, a form sometimes scarcely distin- 
guishable from the induplicato-valvate C3 mode of æstivation seen in 
Cyphocarpus. Yn the structure of its ovarium, it resembles at the 
period of its first growth, that usually seen in most of the genera of 
- the Campana! alliance : it is two-celled, with numerous ascending 
ovules arranged about the axis, on each side of a narrow central pla- 
centary line ; but the dissepiment consists of an extremely delicate 
membrane, which at an early stage begins to shrink from the walls 
of the ovarium, and soon evanesces entirely, leaving a unilocular 
cell, with a linear, central, free placenta, about which the 
ovules are crowded, and become perfected. This placenta is 
very narrow, and although thicker than the dissepiment, is still 
membranaceous, being marked by six very fine parallel ovuligerous 
nerves, arranged in threes, and leaving a broader intermediate 
space, which is sometimes, but not always, cleft for a short dis- 
tance in the middle: this shows an evident tendency towards the 
placentation of the Zysipomee, especially through the genus 
Hypsela, of Presl. I am not aware of the existence of a similar 
structure in any genus of this alliance. It differs also from all 
the orders before mentioned, in the peculiar form of its corolla, 
which is quite monopetalous and bilabiate, one of the lips of its 
border being galeate, with wmged margins, and surmounted by a 
single terminal, delicate, oblong lobe, while the other lip is fur- 
nished internally with a prominent ringent palate, and has four : 
distinct, terminal, oblong lobes, of delicate texture, like that of - 
the other lip; these five lobes have all the same common indupli- 
cate æstivation. The style is quite glabrous, and declinate at the 
summit, and the stigma is deficient of the singular indusium of 
the Goodenoviacee, although it has a few external setose hairs, as 
in the Campanulacez ; it is subsequently glabrous, bilabiate, with — 
-fleshy reflexed lobes, and a small gland in the sinus; indeed, it — 
