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..
Cornus rugosa Lam. Encycl. 2: 115. 1786.
C. circinata L'Her. Cornus, 7. pl. 3. 1788.
A shrub, 3°-10° high, the twigs warty, green and glabrous. Leaves petioled, entire, broadly ovate, orbicular, or even wider than long, acute, or short-acuminate at the apex, mostly rounded or truncate at the base, pale and densely soft-pubescent beneath, slightly pubescent above, 2'-6' long; petioles 3"-9" long; flowers white in rather dense cymes 1 1/2'-2 1/2' broad, the pedicels usually somewhat pubescent; petals ovate; fruit globose, light blue, about 2 1/2" in diameter; stone subglo-bose, somewhat ridged.
A shrub, 3°-10° high, with purplish twigs, the youngest commonly pubescent. Leaves petioled, ovate, oval, or ovate-lanceolate, acuminate at the apex, narrowed or rounded at the base, usually finely pubescent with brownish hairs beneath, glabrous or minutely appressed-pubescent above, 1'-5' long; flowers white, in rather compact flat cymes 1 1/2'-2 1/2' broad; petals narrowly oblong; fruit globose, light blue, 3"-3i" in diameter, stone oblique, ridged, narrowed or pointed at base.
In low woods and along streams, Newfoundland to Ontario, Florida, North Dakota, Nebraska and Texas. Swamp dogwood. Blueberry-cornell. Red-osier; red-brush or -willow. Rose-willow. Squaw-bush. May-July.
Cornus Priceae Small, Torreya 1: 54. 1901.
Svida Priceae Small, Fl. SE. U. S. 854. 1903.
A branching shrub, 3°-6° high, the twigs red, finely pubescent. Leaves numerous, elliptic to ovate-elliptic or ovate, usually acuminate at the apex, deep green and roughish pubescent above, pale and more copiously, but more softly pubescent, and prominently nerved beneath, 2'-4 3/4' long; petioles 1/3'-3/4' long, pubescent like the twigs; cymes closely flowered, 4-6 cm. broad at maturity; petals white, oblong-lanceolate to linear-lanceolate; fruit about \\" in diameter, subglobose, white; stone about 1" long, slightly longer than broad, faintly ribbed.