THE FLORA OF SOUTH AMERICA. 353 
ovate, acute lobes, with undulated margins, and terminated 
by a woolly rostrate apex; the stamens are included; the 
filaments, entirely free, slender, glabrous, erect, and re- 
curved at the summit, arise from the points of a slender, 
adnate, 5-toothed ring in the base of the corolla; the anthers 
are ovate, cordate, 2-lobed. The ovarium is round and smooth ; 
the style short and thick; the stigma clavate, broad, and 2- 
lobed. 
PIONANDRA. 
Under this name I propose to found a genus comprising 
some Solanaceous small trees and arborescent shrubs with 
wide spreading branches, and long racemes of flowers, 
similar to three species that I found in the Organ Mountains 
in 1829 and 1838. The Witheringia diploconos,* figured by 
Von Martius in his Nov. Gen. et Sp. vol. 111. p. 76, tab. 229, 
evidently belongs to this genus, the characters of which may 
be thus defined. 
PronanpRra (gen. nov.) Calyx parvus, 5-partitus, persistens. 
Corolla hypogyna, tubo brevissimo, limbo amplo, 5-partito, 
lobis 5 subcarnosis basi inflatis vel lanceolatis tenuioribus, 
&stivatione marginibus (fere valvatis) introflexis, interdum 
mucroni lineari rostratis. Stamina 5, æqualia, circa stylum 
conniventes ; filamenta breves, erecta, ex annulo plus 
minusve carnoso tubo adnato orta, crassa, lata, sæpissime 
utrinque auriculata, nunc figura sigmoidea recurvata, nunc 
* The genus Witheringia, according to the latest arrangement in the 
. Repert. Bot. of Walpers, 3.29, contains many (24) heterogeneous species, 
. and it appears to me that very few of those enumerated, harmonize with 
the generic character as established by L’Heritier. In the herbarium of 
Sir William Hooker, I can find no plant corresponding with the typical 
Species ; and in the British Museum where L’Heritier’s original specimens 
Are deposited, there are two plants marked Witheringia solanacea, both 
2 different, and neither answering to the figure and description of the founder 
. of the genus. [n the absence, therefore, of the typical plant, without any 
. good description of it, or any satisfactory drawing of its details, without 
even the knowledge of the country where the original was obtained, nor 
whom collected, it is difficult to understand the true limits of the genus. 
— VOL. tv. x De 
