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..
Viburnum dentatum var. pubescens Ait. Hort. Kew.
1: 372. 1789. V. pubescens Pursh, Fl. Am. Sept. 202. 1814.
A shrub, 2°-5° high, with numerous straight and slender gray branches. Leaves sessile, or on petioles less than 3" long, ovate or oval, rounded or slightly cordate at the base, acute or acuminate at the apex, coarsely dentate, 1 1/2'-3' long, densely velvety-pubescent beneath, glabrous, or with scattered hairs above, or rarely glabrate on both surfaces; cymes peduncled, 1 1/2'-2 1/2' broad, the flowers all perfect; drupes oval, nearly black, about 4" long; stone slightly 2-grooved on both faces.
Rocky woods and banks, Quebec and Ontario to Manitoba, south, especially along the Alleghanies to Georgia and to Illinois, lowa, Michigan and Wyoming. The leaves of shoots are sometimes entire or nearly so. June-July.
Viburnum dentatum L. Sp. Pl 268. 1753.
A shrub with slender glabrous gray branches, sometimes reaching a height of 150. Twigs and petioles glabrous; petioles S"-I2" long; leaves ovate, broadly oval or orbicular, rounded or slightly cordate at the base, acute or short-acuminate at the apex, prominently pinnately veined, coarsely dentate all around, 1 1/2'-3' broad, glabrous on both sides, or sometimes pubescent with simple hairs in the axils of the veins beneath; cymes long-peduncled, 2'-3' broad; flowers all perfect; drupe globose-ovoid, about 3" in diameter, blue, becoming nearly black; stone rather deeply grooved on one side, rounded on the other.
V. dentatum semitomentosum Michx. Fl. Bor.
Am. 1: 179. 1803. V. dentatum var. (?) scabrellum T. & G. Fl.
N. A. 2: 16. 1841. V. scabrellum Chapm. Fl. S. States 172. 1860. V. semitomentosum Rehder, Rhodora 6: 59.
Similar to the preceding species but the twigs, petioles, rays of the cyme and lower surfaces of the leaves more or less densely stellate-pubescent; petioles short and stouter; leaves usually larger, crenate or dentate, commonly somewhat pubescent above; drupe globose-ovoid, blue, 4" in diameter, its stone similar to that of V. dentatum.
Woodlands and river banks, southern Pennsylvania to Kentucky, Florida and Texas. Referred, in our first edition, following previous authors, to V. molle Michx., a species long misunderstood.