APPENDIX. 169 
succession. I proceed now to add a few remarks upon each tribe 
separately. 
1. Nicotianee.—The estivation of the corolla in this tribe, as 
has been just remarked, is by no means valvate, or induplicato- 
valvate, as in the Solanaceae, the lobes of its border being on the 
contrary conduplicate, that is to say, the sides are turned inwards, 
and each lobe is thus folded separately on its inner face, along 
the central nervure, the sides closely pressed together, the mar- 
gins being quite free from those of the adjoining lobes, and thus 
plicated, they all possess a spirally twisted inclination in the bud. 
This approaches the estivation of the Salpiglossidee, to which 
tribe they offer a still nearer affinity in having the fifth stamen 
very often shorter, with the other four somewhat didynamous. 
It is for these reasons that I have removed the Nicotianee from 
the Solanacee, where I formerly placed them. 
2. Daturee.—With this very natural group Solandra has been 
associated by most botanists, but it evidently possesses a very 
different relationship. The Daturee are remarkable for their 
large showy flowers, and they all present an zstivation similar to 
that of the Nicotianee, only more decidedly contortive and quite 
distinct from the valvate preefloration of the Solanacee. Brug- 
mansia I consider as most decidedly distinct generically from 
Datura, with which it is associated by most botanists, differing 
im many points of structure, and forming arborescent shrubs, 
sometimes even tall trees, with long pendent trumpet-shaped 
flowers of an unusually large size. 
3. Duboisiee.—The genera composing this very distinct group 
were partly included by Mr. Bentham (Prodr. DeCand. x. 191) 
in his Salpiglossidee; these are Duboisia and Anthocercis, to 
which Prof. Endlicher added Anthotroche, a genus which by the 
former has been referred to Solanacee. In proposing to alter 
the decisions of so distinguished a botanist as Mr. Bentham, who, 
from the accuracy of his observations and the solidity of his con- 
clusions, stands deservedly as one of the first botanists of our 
time, it becomes necessary that I should offer some extremely 
valid reasons for the changes now suggested, and accordingly I 
will offer a few remarks on each genus in succession. 
a. Duboisia appears to me to have no relation with any genus 
belonging to the Scrophulariacee. Its only species was originally 
described by Mr. Brown in his ‘ Prodr.’ p. 448, who placed it, 
together with Anthocercis, in a second section of Solanee. The 
habit of this plant, as well as the structure of its flowers, are 
there stated to agree with those of Myoporum, whence it derived _ 
its specific name: the figure given of this plant by Endlicher in 
his ‘ Iconographia,’ pl. 77, sufficiently agrees with other Myo- 
poraceous plants there designed. On examining a specimen of 
