This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Twining herbaceous vines, with petioled entire lobed or pinnately parted leaves, and cymose racemose or solitary peduncled axillary flowers. Sepals 5, herbaceous, equal, acuminate, mucronate or appendaged. Corolla salverform (usually scarlet in the following species), the tube narrow, somewhat dilated above, mostly longer than the spreading 5-lobed limb. Stamens and simple style more or less exserted; stigma capitate; ovary 2-celled or falsely 4-celled, 4-ovuled. Fruit usually 4-celled and 4-seeded. [Greek, dwarf kidney-bean.]
About 10 species, of warm and tropical regions, only the following in North America. Type species: Ipomoea coccinea L.
Leaves pinnately parted into very narrow segments.
1•; Q• Quamoclit.
Leaves cordate, acuminate, entire or angulate-lobed.
2. Q. coccinea.
Annual, glabrous; stem slender, twining to a height of 10°-20°. Leaves ovate in outline, petioled or nearly sessile, 2'-7' long, pinnately parted nearly to the midvein into narrowly linear entire segments less than 1" wide; peduncles slender, commonly much longer than the leaves, 1-6-flow-ered; pedicels 1' long or more, thickening in fruit; sepals oblong, obtuse, usually mucronulate, 2"-3" long; corolla scarlet, rarely white, salverform, 1'-1 1/2' long, the tube expanded above, the limb nearly flat, the lobes ovate, acutish; stamens and style exserted; ovary 4-celled; ovule 1 in each cell; capsule ovoid, 4-valved, about 5" high, twice as long as the sepals.
In waste and cultivated ground, Virginia to Florida, Kansas and Texas. Sparingly escaped from gardens farther north. Naturalized from tropical America. July-Oct. American red bell-flower. Sweet-william-of-the-Barbadoes. Cupid's-flower. Red jasmine.
Annual, glabrous or puberulent, stem twining to a height of several feet or trailing. Leaves ovate to orbicular, deeply cordate, long-acuminate, 2'- 6' long, entire or angulate-lobed, slender-petioled; peduncles few-several-flowered, usually not longer than the leaves; sepals oblong, obtuse, about 2" long, subulate-appendaged; corolla scarlet, salverform, 10"- 20" long, the limb obscurely 5-lobed; stamens and style slightly exserted; ovary 4-celled with 1 ovule in each cell; capsule globose, 4-valved, 3"-4" in diameter.
Along river-banks and in waste places, Rhode Island to Pennsylvania, Florida, Ohio, Missouri, Texas and Arizona. Naturalized from tropical America, or native in the Southwest. A hybrid of this species with the preceding is sometimes cultivated. American jasmine. July-Oct.