Hydrangea quercifolia W. Bartram
Oak leaved hydrangea, oakleaf hydrangea
Oakleaf hydrangea is native to North America. See this Hydrangea comparison table.
Plants: Shrubs are up to 8′ (2.4 m) tall, and about the same around. Bark is cinnamon-colored and felt-like, peeling when older.
Leaves: Dark green, opposite, lobed like oak leaves, longer than they are wide, up to 1′ (30 cm) long. In the fall, the leaves are attractively colored, including a deep red-violet.
Flowers: Large (up to 1′ (30 cm)) flower clusters contain many cream-colored, white or pinkish flowers. Individual flowers are about 1″ (2.5 cm) around.
Fruits: Small brown dehiscent capsules.
Habitats: Hardwood forest understories, in calcium-bearing soil.
By H. Zell. 
Online References:
6/15/2010 · Garden in the Woods, Framingham, Massachusetts 
8/31/2013 · Lewis Ginter Botanical Garden, Richmond, Virginia · ≈ 15 × 10″ (37 × 25 cm) 
6/15/2010 · Garden in the Woods, Framingham, Massachusetts 
9/14/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 9 × 14″ (23 × 35 cm) 
9/14/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 1 × 1′ (37 × 41 cm) 
9/14/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 10 × 15″ (26 × 39 cm) 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
| Subclass | Rosidae | Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more |
| Order | Rosales | Rose family and eight others |
| Family | Hydrangeaceae | Hydrangea family |
| Genus | Hydrangea | From Greek hydro, “water,” and angeion, “vessel” |
| Species | quercifolia | “With oak-like leaves” |
Hydrangea quercifolia description by Thomas H. Kent, not updated.
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