198 KEY AND FLORA 
Flowers variously clustered, rarely solitary, often large and 
showy. Sepals 5. Corolla hypogynous, regular, tubular, bell- 
shaped or funnel-shaped; its limb more or less 5-lobed or 
angled. Stamens 5, inserted on the corolla tube. Ovary usu- 
ally 2-4-celled; style slender, 2-4-cleft ; ovules 1 or 2 in each 
cell. Capsule 1-4-celled, 24-valved, or bursting open across 
the base. 
I. IMPOMGA L. 
Annuals or perennials ; stems often twining. - Flowers showy. 
Calyx not bracted at the base, of 5 sepals. Corolla bell-shaped 
or funnel-shaped, twisted in the bud. Stamens not projecting 
from the corolla. Style slender; stigma knobbed, 2-lobed. 
Fruit a 2-8-celled capsule. [I purpurea, the common morn- 
ing-glory, blossoms too late for school study. I. Batatas, the 
sweet potato, seldom flowers. ] 
B. Fl. species 1 (Quamlocit). 
1. I. Quamlocit L. Cypress Vine. Stem slender, smooth, twin- 
ing high. Leaves dark green, pinnately cut, the divisions linear, 
smooth. Peduncles slender, as long as the leaves, 1—-5-flowered ; 
pedicels thickened upward. Sepals ovate or oblong, mucronate. 
Corolla. bright scarlet, or sometimes yellowish-white, salverform ; 
the tube 1-1} in. long; the limb flat and spreading, 3-2 in. wide. 
Capsule ovoid, twice the length of the sepals. Common in gardens.* 
2. I. hederacea Jacq. Witp Mornine-Guiory. Stems hairy, twin- 
ing. Leaves heart-shaped, 3-lobed. Peduncles 1-3-flowered. Calyx 
very hairy below. Corolla showy, bluish-purple or white. Pod ‘usu- 
ally 8-celled, with 2 seeds in each cell. A weed in fields and about 
dwellings. Introduced from tropical America. 
3. I. pandurata G. F. W. Mey. Witp Potato Vine. Perennial, 
from a very large, tuberous root; stem trailing or twining, smooth 
or slightly downy, 5-10 ft. long. Leaves broadly heart-shaped, with 
the apex slender and obtuse, sometimes fiddle-shaped or 3-lobed; 
petioles slender. Peduncles longer than the petioles, 1—-5-flowered. 
Sepals oblong, obtuse, smooth, mucronate, the 2 outer ones shorter. 
Corolla white with a purple throat, 2-3 in. wide, lobes pointed. Cap- 
sule globose, 2-3-seeded, the seeds woolly on the angles. On dry or 
damp sandy soil, along fences, railroad embankments, ete. ; ; common 
S. and W-* 
4. I. leptophylla Torrey. Busan Mornine-Giory. Perennial. 
Stems smooth, much branched, erect, ascending or reclining, 2-4 ft. 
