This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", 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..
Euonymus obovatus Nutt. Gen. 1: 155. 1818.
Euonymus americanus var. obovatus T. & G.; A. Gray, Gen. 2: 188. 1849.
A low decumbent shrub, seldom rising over a foot from the ground, branching, rooting from the prostrate twigs. Branches 4-angled or slightly winged; leaves obovate or elliptic-obovate, rather thin, mostly acute or cuneate at the base, obtuse at the apex, finely crenulate-serrulate, 1'-2' long, 1/2'-1 1/2' wide, glabrous; petioles 1"-2" long; peduncles 1-4-flowered; flowers greenish, smaller than in the preceding species, about 3" broad; petals generally 5, nearly orbicular, crenulate or erose, close together or even slightly overlapping, with scarcely any claw; capsule commonly 3-cell-ed, slightly lobed, depressed, tuberculate.
A shrub or small tree, 6°-25° high. Twigs obtusely 4-angled; leaves ovate-oblong or elliptic, 1 1/2'-5' long, \'-2\' wide, acuminate at the apex, acute or obtuse at the base, puberu-lent, especially beneath, crenulate-serrulate, rather thin; petioles 4"-8" long; peduncles very slender, 1'-2' long, bearing a trichoto-mous 5-15-flowered cyme; pedicels 3"-6" long; flowers purple, 5"-6" broad; petals commonly 4, obovate, undulate; capsule smooth, deeply 3-4-lobed, 6"-8" broad.
Euonymus europaeus L. Sp. Pl. 197. 1753.
A glabrous shrub, 3°-9° high, resembling the preceding species. Leaves oblong to ovate-lanceolate, acuminate, crenulate; peduncles mostly less than 1' long, stouter; cymes 3-7-flowered; flowers greenish-yellow or yellowish-white, about 5" broad; petals 4 (rarely 5), oblong or obovate; capsule smooth, deeply 4-lobed.
Escaped from cultivation to copses and roadsides, Virginia, New York and New Jersey. June. Arrow-beam. Prick-timber. Prickwood. Cat-tree. Pegwood. Pincushion-shrub. Skiver- or skewer-wood. Witch-wood. Louseberry. Gatteridge. Butchers' prick-tree. Gaiter- or Gatten-tree. European dogwood.