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..
Tilia pubescens Ait. Hort. Kew. 2: 229. 1789. T. americana var. pubescens Loud. Arb. Brit. 1: 374. 1838. A small tree, 40°-50° high, with a trunk 1° in diameter. Leaves generally smaller than those of T. americana, glabrous above, brown-pubescent, or sometimes densely woolly beneath; floral bracts commonly broader and shorter, narrowed or rounded at the base; fruit globose, 2 1/2" -3" in diameter.
A forest tree, 45°-7o° high, with a trunk 1 1/2°-3 1/2° in diameter. Leaves larger than in either of the preceding species (often 6'-8' long), inequilateral, cordate or truncate, glabrous and dark green above, white beneath with a fine downy pubescence, acute or acuminate; floral bracts 3-5' long, narrowed at the base; flowers slightly larger and often fewer than those of T. americana; fruit globose, about 5" in diameter.
In woods, New York and Pennsylvania, south along the Alleghanies and Blue Ridge to Florida and Alabama, west to central Illinois, Kentucky and Tennessee. White linn. Teil- or tile-tree. Cottonwood. Silver-leaf poplar. Wahoo. Wood weak, light brown; weight per cubic foot 26 lbs. June-July.
The European linden or lime-tree, Tilia europaŔa L., is planted as an ornamental tree in parks and on lawns. It may be distinguished from any of our species by the absence of scales at the base of the petals. Its name, Lin, was the origin of the family name of Linnaeus.
T. Michauxii Nutt. Sylva, Ed. 2, 92. 1842
A forest tree, sometimes 900 tall, the bark broadly furrowed, or that of the branches smooth and silvery gray Leaves firm in texture, 9' long or less, serrate, whitish-pubescent beneath, the apex acuminate, the base usually very oblique; floral bracts spatulate, attenuate toward the base and decurrent on the peduncle to above its base; staminodes spatulate; petals light yellow, 3"-5" long; fruit ovoid or globose, 4"-7" long.
In rich soil, Connecticut to Ohio, Georgia, Kentucky and Alabama. June-July.