Hydrangea

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Hydrangea L.

Kingdom	Plantae	Plants, but not fungi, lichens, or algae
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”

About plant names...

Hydrangeas are hardy shrubs or sometimes small trees that are native to many areas of the world. Their large, copious, beautiful flowerheads make them popular for foundation plantings, and many cultivated varieties exist. Hydrangea macrophylla flowers have a pigment whose color depends on soil acidity, may be white, blue, purple, or pink.

Online References:

Plantaddicts.com

The United States National Arboretum

The American Hydrangea Society

The University of Rhode Island Landscape Horticulture Program GreenShare Factsheets

(Hydrangea) · 8/8/2010 · Rod and Ellen’s, Westford, Massachusetts Species not yet identified

Here are a few of the many varieties of hydrangeas:

	*Hydrangea arborescens ‘Annabelle’*	*Hydrangea arborescens ‘Dardom’*	*Hydrangea paniculata ‘Grandiflora’*
Common Name	wild hydrangea	smooth hydrangea	peegee hydrangea
Plant	Shrubs that reach 3-5′ (91-152 cm) in height.	Shrubs are 3-5′ (91-152 cm) high.	These shrubs reach heights of 15-25′ (4.6-7.6 m), and somewhat less in diameter, often taking the form of a small tree.
Flowers	Large white flowerheads up to 8-12″ (20-30 cm) across.	Dome-shaped corymbs 6-10″ (15-25 cm) around contain both sterile and mostly fertile flowers.	White or pink, more cone-shaped than ball-shaped, in clusters up to 10″ (25 cm) long and 8″ (20 cm) around. They bloom from July to September.
Leaves	Dark green, wrinkled, 8-12″ (20-30 cm) across.	Elliptical, serrated, 3-8″ (7.6-20 cm) long, and dark green.	Opposite, roughly oval shaped, with serrated edges, 2-5″ (5-12 cm) long.
Fruit
Range/ Zones	USDA Zones: 3-9	USDA Zones: 4-9	USDA Zones: 3-8
Habitats		Wooded slopes, bases of hills, shaded banks, ravines
Type	Cultivar	Cultivar	Cultivar

	*Hydrangea paniculata ‘Kyushu’*	*Hydrangea quercifolia*
Common Name	panicled hydrangea	oak leaved hydrangea
Plant	These small trees reach heights of 10-30′ (3-9.1 m).	Oakleaf hydrangea favors calcium-bearing soils and grows in open hardwood forests. Shrubs are up to 8′ (2.4 m) tall, and about the same around. Bark is cinnamon-colored and felt-like, peeling when older.
Flowers	Blooms are white or pink, cone-shaped, in clusters up to 10″ (25 cm) long and 8″ (20 cm) around. They bloom from July to September.	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.
Leaves	Leaves are opposite, roughly oval shaped, with serrated edges, 2-5″ (5-12 cm) long.	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.
Fruit		Small brown capsules.
Range/ Zones	USDA Zones: 4-9	USDA Zones: 5-9
Habitats		Hardwood forest understories, in calcium-bearing soil.
Type	Cultivar	Wild

Hydrangea description by Thomas H. Kent, last updated 16 Sep 2020.

Range:

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