621 
IPOMCEA Jalapa; g rosea. 
Mexican or true Jalap. 
— — 
PENTANDRIA MONOGYNIA, 
Nat. ord. CONVOLVULI. Jussieu gen. 132. Div. I. Stylus unicus. 
CONVOLVULACEZ. Brown prod. 1. 481. Sect. IJ. Germen 
unicum. 
IPOMCEA. Supra vol. 1. fol. 9. 
1. Jalapa, pubescens; foliis cordatis integris lobatisque plicato-rugosis sub- 
tùs subtomentosis, pedunculis 1-3-floris, foliolis calycis ovalibus muticis, 
corollis campanulatis, seminibus prolixe lanuginosis, radice crassissimo. 
Pursh amer. sept. 1. 146. 
(x) macrorhiza: limbo floris albido; foliis szepiüs lobatis. 
Ipomea Jalapa. Nobis supra vol. 4. fol. 342; et ad calcem appendicis ejus- 
dem voluminis. 
Ipomea macrorhiza. Michauz bor.-amer. 1. 141. 
Convolvulus Jalapa. Desfont. in annales du museum d'hist. nat. 2. 126, 
tabb. 40, 41. 
Convolvulus macrorhizus. Elliot sket. 1.252. Nuttall gen. 1. 123. n. 13. 
(8) Jalapa: flore roseo; foliis sæpiùs integris. 
Convolvulus Jalapa. Linn. mant. 42. Ejusd. mat. med. 60. Hort. Kew. 
1. 211. ed. 2. 1.332. Willd. sp. pl. 1. 860. Curtiss magaz. 1572. 
Convolvulus foliis variis, pedunculis unifloris, radice tuberosa. Mill. dict. 
ed. 8. n. 31. 
Bryonia mechoacanna nigricans. Bauh. pin. 298. 
Descr. Vide supra vol. 4. fol. 342. 
A comparison of our plant with the original sample 
from Kew garden, deposited in the Banksian Herbarium, 
leaves us no doubt as to the identity of the present variety 
with the CowvorvuLus Jalapa of the Hortus Kewensis; 
and this sample was known to the learned editors of that 
work to be the same with the plant brought by Dr. Hous- 
toun from Mexico, and communicated as the true Jalap to 
Miller, by whom it was cultivated in the Chelsea Physic 
Garden. 
The medicine consists of dried slices of the tuberous root 
reduced to powder; and is principally collected and pre- 
pared for exportation at Xalapa, a provincial town in Mexico, 
of the name of which “ Jalap” is a corruption. 
In regard to the Carolinian and Georgian plant published 
in the fourth volume of this work (fol. 342) as the variety 
