Tsuga (Antoine) Carrière

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 30

3. Tsuga (Antoine) Carrière 1

Evergreen trees with irregularly whorled branches. Short shoots absent. Leaves spirally arranged, linear, flattened or tetragonal; resin-canal 1; leaves borne on prominent, persistent cushions. Male flowers in leaf-axils of previous year’s twigs. Cones ripening in the first year, pendent, ovoid or cylindrical; scales persistent; bracts rarely exserted. Buds globose; leaves with broad, white stomatiferous bands beneath 1. heterophylla Buds ovoid; leaves with narrow, white stomatiferous bands beneath

2. canadensis