IPOMCE'A PLATEN'SIS 
THE PLATA IPOMCEA. 
EXOGEX^ 
OR 
DICOTTLEBOXEiS. 
Natural division 
to which 
this plant belongs. 
NATURAL ORDER, CONVOLYULACE^. 
COROLLIFLOR.S: 
OF 
DECAXDOLLE. 
Artificial divisions 
to which 
this Plant belongs. 
PEXTAXDEIA, 
MOXOGTXIA, 
OF LIXXEUS. 
No. 205. 
GENUS. Ipomcea. Linx^us. Calyx 5-partitus nudus. Corolla cam- 
panulata rel infundibuliformis, o-plicata. Ovariuai 2-3-loculare, loculis dis- 
permis. Stylus indivisus. Stigma capitatiim, 2-3-lobum. Capsula 2-3-1o- 
cularis. Herba; Tolubiles, quandoque erectae. Folia indivisa vel lobata, 
nunc pinnatifida. Seaiixa in quibusdam comosa. Brown. 
SPECIES. Ipomcea Platensis (Herbert) volubilis; foliis palmatis, 
lobis septenis cuneato-oblongis obtusis extimis minoribus ; pedunculis pauci- 
plurifloris, superne cymosis, petiolo longioribus; calycis foliolis subroiundato- 
ovatis, obtusis. 
Character of the Genus, Ipomcea. Calyx five-parted, naked. 
Corolla campanulate or funnel-shaped, five-plicate. Germen 2-3- 
celled, cells 2-seeded. Style simple. Stigma capitate 2-3-lobed. 
Capsule 2-3-celled. 
Description of the Species, Ipomcea Platensis. Root large 
and tuberous. Stems several, long, slender, twining, warted. Pe¬ 
tioles (two inches long) spreading, shorter than the leaves, warted, 
channelled. Leaves (five inches across) pedate, 7-lobed; lobes lin¬ 
ear, narrow, each with a strong middle rib, which is very prominent 
behind, and in some degree in front, but there much more slender and 
lodged in a groove, veins oblique, rather obscure on both sides; the 
three middle lobes may be looked upon as subdivisions of one, their 
middle ribs being in contact or united for about half an inch, and the 
two lateral lobes on each side may be so considered, but their middle 
ribs diverge from their origin. Peduncles (4|-5 inches long) axil¬ 
lary, solitary, shorter than the leaves, in diflbrent varieties smooth or 
warted, slightly compressed, one or more flowered, with several abor¬ 
tive buds. Calyx of five rather unecjiial, concave, oval, conuivent, 
imbricated leaflets. Corolla (in most of the varieties about 2J inches 
across with a tube above one inch long) funnel-salver-shaped, every¬ 
where glabrous; limb plicate, of five undulate emarginate lobes, sep¬ 
arated by shallow’ sinuses; tube cylindrical, narrowed within the 
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