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An illustration of a maple leaf.

Maple Leaf

An illustration of a maple leaf.

The tarspot disease of maple is caused by rhytisma acerinum. The diseased spots appear as blotches of tar on the upper surface of leaves.

Maple Leaf with Tarspot Fungus

The tarspot disease of maple is caused by rhytisma acerinum. The diseased spots appear as blotches of…

"1. Acer circinatum. 2. flower of A. campestre; 3. its samara; 4. the same, with the seed laid bare; 5. the embryo unfolded." -Lindley, 1853

Vine Maple

"1. Acer circinatum. 2. flower of A. campestre; 3. its samara; 4. the same, with the seed laid bare;…

Geometric pattern for translation and rotation exercises.

Geometric Block Pattern 39

Geometric pattern for translation and rotation exercises.