Populus grandidentata

Large-tooth or bigtooth aspen is in the willow or Salicaceae family and is native to eastern North America, from southern Ontario and New Brunswick in Canada down to parts of Iowa and northeastern Missouri; and east through Illinois, Indiana, Ohio, and West Virginia in the U.S. Isolated populations are found in Kentucky, Tennessee, North Carolina, and South Carolina.

• Leaves are alternate, simple, nearly round, up to 12 cm long , with moderately large blunt teeth, flat petioles, green above, paler below.
• Species is dioecious. Males and females form fuzzy catkins up to 7 cm long before leaves appear in the spring.
• Seed capsules develop in late spring, opening to release many small seeds attached to cotton-like strands which carry the seeds in the wind to disperse them.
• Stems are medium texture, gray-brown; buds are ovate, quite pointed. Bark is olive green to gray-brown, having small diamond-shaped scars when older.