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..
Climbing woody vines with aerial rootlets, with opposite pinnately compound leaves, and large showy red or orange flowers, in terminal corymbs. Calyx tubular-campanulate, somewhat unequally 5-toothed. Corolla-tube elongated, enlarged above the calyx, narrowly cam-panulate, the limb slightly 2-lipped, 5-lobed, the lobes spreading. Anther-bearing stamens 4, didynamous, ascending under the upper lip; anther-sacs divergent, glabrous or slightly pubescent. Capsule elongated, slightly compressed at right angles to the partition, loculicidally and septicidally dehiscent. Seeds in several rows on each side of the margins of the partition, flat, winged, the wing translucent. [Named after the Abbe Bignon, 1662-1743, librarian to to Louis XV.]
Two known species, the following typical one, the other Japanese. The name Tecoma, used for this vine in our first edition, belongs properly to a genus of pinnate-leaved yellow-flowered shrubs of tropical America, typified by Tecoma stans (L.) H.B.K.
A woody vine, climbing to the height of 20°-40° or prostrate if meeting no support. Leaves petioled, odd-pinnate, not tendril-bearing, 8'-15' long; leaflets 7-11, ovate to lanceolate, short-stalked, sharply serrate, reticulate-veined, glabrous, or pubescent on the veins beneath, acute or acuminate at the apex, narrowed at the base, 1 1/2'-3' long; flowers corymbose, short-pedicelled; corymbs 2-9-flowered; calyx coriaceous, about 1' long; corolla scarlet, 21/2' long., the tube veined within, 3 times as long as the limb, anther-sacs glabrous; stigma spatulate; capsule stalked, 4'-6' long, 10" in diameter, narrowed at both ends, little flattened, ridged above and below by the margins of the valves; seeds in several rows on each surface of the broad partition, broadly winged laterally, the wing eroded.
In moist woods and thickets, southern New Jersey and Pennsylvania to Florida and Texas, north to Illinois and Iowa. Escaped from cultivation further north. Trumpet-vine. Trumpet-ash. Cow-itch. Cross-vine. Aug.-Sept.