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..
Fraxinus quadrangulata Michx. Fl. Bor. Am. 2:
A large forest tree, sometimes becoming 110° high, the trunk reaching 30 in diameter, the twigs 4-sided, the foliage glabrous, or sparingly pubescent when young. Leaflets 7-11, ovate, oblong or lanceolate, acuminate at the apex, rounded or narrowed at the base, short-stalked (2"-3"), green on both sides, sharply serrate or serrulate, 3-5' long, 1-2' wide; flowers dioecious, the calyx of the pistillate ones obsolete; anthers linear-oblong; samara linear-oblong or cuneate, 1'-2' long, 3"-7" wide, winged all around, parallel-nerved, the body extending more than half-way to the apex.
Fraxinus nigra Marsh. Arb. Am. 51. 1785. Fraxinus sambucifolia Lam. Encycl. 2: 549. 1786.
A swamp tree, reaching a maximum height of about 100° and trunk diameter of 30, the twigs terete, the foliage glabrous, except the midrib of the lower surfaces of the leaflets. Leaflets 7-11, sessile, green on both sides, oblong-lanceolate, long-acuminate at the apex, narrowed or rounded at the base, sharply serrate or serrulate, 3'-6' long, 9'-18" wide; flowers dioecious; calyx none; anthers short-oblong; samara oblong or linear-oblong, parallel-nerved, 1'-l 1/2' long, 3"-4" wide, the body flat, winged all around, extending to or beyond the middle.
In swamps and wet woods. Newfoundland to Manitoba, south to Virginia, Illinois and Arkansas. Wood heavy, soft, not strong, dark brown; weight per cubic foot 39 lbs. April-May. Swamp-, basket-or water-ash.