962 CONVOLVULACEAE 
Leaf-blades cordate at the base, of an ovate type. 
Sepals pubescent : seeds with long wool all over. 3. I. Jalapa. 
Sepals glabrous : seeds with long wool on the angles. 4. I. pandurata. 
Leaf-blades acute or truncate at the base, of a lanceolate type. 5. I. longifolia. 
Leaf-blades sagittate : inner sepals less than 1 cm. long. 6. I. speciosa. 
Sepals acute or acuminate. 
Perennial: calyx glabrous. 7. I. trifida. 
Annual: calyx pubescent, at least sepals ciliate. 
Corolla 3 cm. long or longer. 8. I. Caroliniana. 
Corolla less than 3 cm. long. 
Peduncles shorter than the petioles: corolla-tube white. 9. I. lacunosa. 
Peduncles longer than the petioles: corolla-tube purple. 10. J. triloba. 
b. Leaf-blades palmately 7-parted. 
Terminal leaf-segment entire: sepals becoming 2.5-3 em. long, longer 
than the capsule. 11. I. cairica. 
Terminal leaf-segment pinnatifid : sepals becoming 4-8 mm. long, shorter 
than the capsule. 12. I. dissecta. 
B. Stems erect or diffusely spreading, sometimes shrubby. 
Annual plants: leaf-blades pedately parted : corolla less than 2 em. long. 13. I. costellata. 
Perennial plants: leaf-blades entire: corolla fully 4 em. long. 
Leaf-blades ovate: corolla puberulent without : seeds shaggy-pubescent. 14. J. fistulosa. 
Leaf-blades linear: corolla glabrous without: seeds finely pubescent. 15. I. leptophylla. 
1. Ipomoea littoralis (L.) Boiss. Perennial, glabrous, fleshy. Stems prostrate, 
creeping, several m. long, branching: leaf-blades 2-5 cm. long, the early ones ovate to ob- 
long, the later fiddle-shaped or more deeply lobed, more or less deeply notched at the apex, 
mostly truncate or cordate at the base: sepals glabrous, oblong or oval, 1-1.5 cm. long, 
mucronate or acuminate : corolla white, with a yellow throat ; tube funnelform ; limb 4-7 
cm, broad: capsules subglobose, 1.5 cm. in diameter: seeds woolly. [Convolvulus littoralis 
L. Ipomoea acetosaefolia R. & S.] 
On sandy beaches, South Carolina to Florida and Texas. 
2. Ipomoea Pés-Cáprae (L.) Sweet. Perennial, glabrous, succulent. Stems pros- 
trate, creeping, several m. long, branching: leaf-blades suborbicular, 6-10 em. broad, 
usually notched at the apex, rounded or cordate at the base ; petioles as long as the blades 
or shorter : peduncle stout, 1-several-flowered : pedicels more slender than the peduncles : 
sepals glabrous, oval or suborbicular, about 1 em. long, obtuse: corolla purple, 4-5 cm. 
long ; tube broadly funnelform ; limb undulately-lobed, 5-8 cm. broad: capsules broadly 
ovoid or globose-ovoid, 1.5 em. high : seeds pubescent. 
On sandy beaches, Georgia and Florida to Texas. In all tropics. 
. 3. Ipomoea Jalápa (L.) Pursh. Perennial, finely pubescent. Stems trailing or 
twining, several m. long, branching: leaf-blades broad-ovate, 6-15 cm. long, acuminate, 
erose-crenulate, truncate or subcordate at the base ; petioles nearly as long as the blades or 
shorter : peduncles longer than the petioles: sepals minutely pubescent, oblong or oblong- 
lanceolate, 1.5-2 cm. long: corolla white or pink-purple ; tube 5-8 cm. long, funnelform ; 
limb 5-10 em. broad : capsules ovoid, 1.5 cm. long: seeds with long silky-villous wool. 
In sandy soil, on or near the coast, South Carolina to Florida. Also in tropical America. 
4. Ipomoea pandurata L. Perennial by a huge root, the foliage glabrous or glabrate, 
deep green. Stems trailing or twining, 1-4 m. long, commonly branched : leaf-blades 
ovate, often fiddle-shaped, 3-10 cm. long, acuminate, acute or obtuse, undulate, cordate, 
on slender petioles which are } as long as or as long as the blades : peduncles solitary or ^ 
together, 5-10 em. long, 1-5-flowered ; pedicels subtended by ovate bracts : sepals ovate ay 
oblong, 12-18 mm. long, more or less colored, obtuse, slightly mucronate, imbricat ; 
erect and forming a tube : corolla white or pinkish, 7-10 cm. broad, its tube swollen abou 
the middle, lavender within, its spreading limb with 5 shallow lobes, each lobe imp 
with a linear-lanceolate rib which ends in a broad mucro ; filaments shorter than and adnate 
à the corolla-tube for about 1 cm. from the base, villous at the junction: anthers 6-7 mm. 
ong. 
In dry soil, Ontario to Michigan, Connecticut, Florida and Texas. 
5. Ipomoea longifólia Benth. Perennial, the foliage glabrous or nearly so. No 
trailing, several dm. long, much branched : leaves alternate ; blades lanceolate or oblong- 
lanceolate, 3-7 cm. long, mucronate, entire, acute or truncate at the base, slender-petio : : 
peduncles 1-3 em. long, simple or branched : pedicels usually shorter than the pedunc ef 
sepals ovate or oblong-ovate, 10-12 mm. long, rounded at the apex and sometimes gras i 
ulate, the inner somewhat longer than the outer: corolla 5-7.5 em. long, nearly as broad : 
filaments densely pubescent at the base. 
On plains and prairies, Oklahoma to Texas and Arizona. Summer. 
6. Ipomoea speciósa Walt. Perennial, glabrous. Stems twining, several ran 
branching, relatively slender : leaf-blades 3-10 cm. long, sagittate or hastate-sagittate, 
