SOUTH AMERICAN PLANTS. 45 
21. Pionandra flagrans. Solanum flagrans. Tenore, Ann. Sc- 
Nat. 13.381 ,—arborescens : foliis geminis utrinque glabris, 
oblongo-lanceolatis, acutis, integerrimis, racemis secundi- 
floris, extra-foliaceis, pedunculis incrassatis.— Brasilia. 
It is probable that under a careful revision of the exten- 
sive Linnean genus Solanwm, which is greatly required, many 
other species will be found to come within the limits of 
Pionandra. tis with much doubt I have placed here the 
last four species which are only known from the short des- 
criptions quoted; when examined with more attention they 
may probably be found to belong to another group, many 
species of which I have observed in the splendid herbarium 
of Sir Wm. Hooker; I allude to such as approach S. conicum 
R. & P. Flor. Peruv. tab. 172, 6. Many of these have simple, 
others pinnate leaves, sometimes smooth, often with stellate 
tomentum; they have racemes either simple or scorpioid, 
often dichotomously branched, either extra-axillary or grow- 
ing out of the bifurcation of the branches, they have very 
long narrow coriaceous anthers, and a peculiar form of style; 
a section of this same group, numerous in species, have their 
stems and petioles aculeate, such as S. torvum loc. supra cit. 
tab. 175 a. S. lanatum, tab. 174 b, S. incarceratum, tab. 176. 
The present arrangement of the genus Solanum comprising 
upwards of 500 species, is certainly very defective, the form 
of the leaves, offering very unsatisfactory, and uncertain 
characters on which to found any subdivisions; far better 
elements will be found to exist in the floral characters as- 
sisted by the particular habit of the several species; much 
therefore may be expected from the distinguished author of 
the well-known monograph on Solanum, who has undertaken 
the arrangement of the nat. ord. Solanacez, for the forth- 
coming volume of the Prodromus of De Candolle. 
SorREMA. 
The following details of Nolana paradoxa, Lindl., were 7 
made as far back as 1823, and notwithstanding several 
species of Nolana have already been figured at different 
