Trees of Wisconsin

Key to the Trees of Wisconsin

73. Stipules persisting on the twigs into maturity; leaf blades usually less than 2 cm wide; petioles less than 0.6 cm long.	Salix nigra
73. Stipules absent or soon deciduous, not present on mature twigs; leaf blades broader than 2 cm, or if less than 2 cm wide (S. fragilis) then strongly glaucus; petioles 0.5 - 2 cm long.	74