| Leaves lack the thick tomentum beneath the leaf that characterizes the white linden. |
| Capsule, ¾ inch long, ⅓ broad, rather turgid, densely covered with rusty tomentum. |
| The upper surface of the pileus is smooth, or sometimes more or less covered with a tomentum similar to that on the margin. |
| Atrotomentosus is from ater, black, and tomentum, woolly or downy. |
| The tomentum of Pallidum species is thick, like felt, and typically aggregates into clumps of shaggy or woolly hair. |
| Nothing can exceed the difference between the two, both in shape and tomentum. |
