DESCRIPTIVE LIST OF NEW PLANTS. 
133 
DESCRIPTIVE LIST OF NEW PLANTS. 
Apocynace^. —Pentandria Monogynia. 
Echites Franciscea (De Candolle). A fine, fragrant hot-house 
climber, of considerable beauty, the introduction of which was 
effected by his Grace the late Duke of Northumberland. It is 
found in the Brazilian desert, near the river San Francisco, whence 
it takes its name. The flowers are borne on short axillary ra¬ 
cemes ; they are rather small for the genus, deep rose colour, 
having a green centre, and appear to be copiously produced.— 
Bot. Reg. 
Bora gin ace,®. *—Pen tandria Monogynia. 
Macromeria exserta (Don). A half-hardy perennial, discovered 
by Hartweg near Tuspan and Anganguco, in his first journey in 
Mexico; but it was not till his second visit, in 1846, that he 
succeeded in obtaining ripe seeds. It grows from two to three 
feet high, terminating in a branched panicle of long, tubular, 
yellow flowers. The limb is divided into five narrow, spreading 
lobes, and the stamens project in a remarkable degree beyond 
the orifice of the tube. Its foliage, however, is too coarse to 
make it of much value as an ornamental plant; and its flowers, 
which always droop, fall so soon after opening, that it never 
looks so well as its showy appearance on paper or in the herba¬ 
rium would lead us to expect.— -Bot. Reg. 26-47. 
CoNVOLVULAGEiE.— Pentandria Monogynia. 
Jacquemontia canescens (Bentham). The type of the genus 
Jacquemontia is the old Convolvulus pentanthus, of which M. 
Ghoisy now regards this as a variety. It differs from Phor- 
bitis in having but two cells in the ovary; from Ipomcea in the 
lobes of its stigma being flat, not spherical; and from Convol¬ 
vulus in their not being long and narrow. It is a perennial 
twining plant, with the stems and leaves closely covered with 
a short down, which is brown and white, and by no means jus¬ 
tifies the name of canescens. The leaves are about two inches 
long, of a firm texture, concave, heart-shaped at the base, with 
an oblong outline, which is rather wavy. The flowers grow in 
