Fraxinus pennsylvanica, Marshall

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 53-54

2. F. pennsylvanica Marshall , Arbust. Amer. 51 (1785)

( F. lanceolata Borkh. ).

Tree up to 20 m, with brownish-red and slightly furrowed bark; twigs and petioles glabrous to densely pubescent, stout; buds brown. Leaflets 5-7(-9), 80-150x 25-50 mm, ovate-lanceolate to oblong-lanceolate, acuminate, broadly cuneate, irregularly serrulate to entire, glabrous above, more or less pubescent beneath, at least along the midrib; petiolules 3-6 mm; rhachis glabrous to densely white-pubescent. Calyx persistent; corolla absent. Samara 30-60 x 4-6 mm, the wing lanceolate to oblong-obovate, acuminate to rounded or rarely emarginate, decurrent to below the middle of the slender terete body c. 2 mm in diameter. Cultivated for timber and for shelter in C. & S.E. Europe; sometimes naturalized. [Au Bu Cz Ge Rm Rs (W, E).] (£. North America.)

F. americana L. , Sp. Pl. 1057 (1753), also from E. North America, is planted on a small scale mainly in E. Europe, though the name is at times wrongly applied to F. pennsylvanica . It is like 2 but the petiolules are 5-15 mm and the wing of the samara is not decurrent.