Contains 3 accepted taxa overall.

Characteristics
Hydrangea L.
HYDRANGEA
Classification
CORNALES
Hydrangea
Citation
HYDRANGEA Linnaeus, Sp. Pl. 397. 1753.
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TYPE: Hydrangea arborescens Linnaeus 1753.
Distribution Map Present

This species have been reported in the counties highlighted.

Species
Scientific Name Common Name Herbarium Specimens Status Photos
Hydrangea arborescens WILD HYDRANGEA; MOUNTAIN HYDRANGEA Native Rare-State UPL (NWPL)
Hydrangea barbara COWITCH VINE; CLIMBING HYDRANGEA; WOODVAMP Native FACW (NWPL)
Hydrangea quercifolia OAKLEAF HYDRANGEA; GRAYBEARD Native
Identification Key
1.  Vine; stems glabrous; leaf blade entire to coarsely toothed, unlobed; flowers bisexual
1.  Shrubs; stems hirsute, or tomentose; leaf blade toothed, lobed or unlobed; some flowers larger and sterile
2
2.  Leaf blades unlobed, the lower surface glabrate or pubescent along the veins; inflorescences dome-shaped to hemispheric
2.  Leaf blades with 3-7 lobes, the lower surface tomentose to pilose; inflorescences ovoid to conic
Genus Synonyms
Synonym Full Citation Basionym Type
Adamia Adamia Wallich, Tent. Fl. Napal. 1: 46. 1826. TYPE: Adamia cyanea Wallich 1826.
Broussaisia Broussaisia Gaudichaud-Beaupré, Voy. Uranie 479. 1830. TYPE: Broussaisia arguta Gaudichaud-Beaupré 1830.
Calyptranthe Calyptranthe (Maximowicz) Nakai, Bull. Natl. Sci. Mus. 31: 52. 1952, non Calyptranthes Swartz 1788. BASIONYM: Hydrangea Linnaeus, sect. Calyptranthe Maximowicz, Mém. Acad. Imp. Sci. Saint Pétersbourg, Sér. 7. 10(16): 16. 1867. TYPE: Calyptranthe petiolaris (Siebold & Zuccarini) Nakai 1952. (Hydrangea petiolaria Siebold & Zuccarini 1838.)
Cardiandra Cardiandra Siebold & Zuccarini, Fl. Jap. 1: 119, t. 65-66. 1839. TYPE: Cardiandra alternifolia (Siebold) Siebold & Zuccarini 1838. (Hydrangea alternifolia Siebold 1829.)
Cornidia Cornidia Ruiz López & Pavón, Fl. Peruv. Prodr. 53. 1794. TYPE: Cornidia umbellata Ruiz López & Pavón 1794.
Decumaria Decumaria Linnaeus, Sp. Pl., ed. 2. 1663. 1763. TYPE: Decumaria barbara Linnaeus 1763.
Deinanthe Deinanthe Maximowicz, Mém. Acad. Imp. Sci. Saint Pétersbourg, ser. 7. 10(16): 2. 1867. TYPE: Deinanthe bifida Maximowicz 1867.
Dichroa Dichroa Loureiro, Fl. Cochinch. 301. 1790. TYPE: Dichroa febrifuga Loureiro 1790.
Forsythia Forsythia Walter, Fl. Carol. 153. 1788, nom. rej. vs. Forsythia Vahl 1804. TYPE: Forsythia scandens Walter 1788.
Hortensia Hortensia Commerson ex Jussieu, Gen. Pl. 214. 1789. TYPE: Hortensia opuloides Lamarck 1789.
Macnemaraea Macnemaraea Willemet, Ann. Bot. (Usteri) 18: 34. 1796. TYPE: Macnemaraea opulina Willemeet 1796.
Pileostegia Pileostegia Hook.f. & Thomson, J. Proc. Linn. Soc., Bot. 2: 57, 76. 1857. TYPE: Pileostegia viburnoides Hooker f. & Thomson 1857.
Platycrater Platycrater Siebold & Zuccarini, Fl. Jap. 1: 62, t 27. 1838. TYPE: Platycrater arguta Siebold & Zuccarini 1838.
Sarcostyles Sarcostyles C. Presl ex de Candolle, Prodr. 4: 15. 1830. TYPE: Sarcostyles peruviana C. Presl ex de Candolle 1830.
Schizophragma Schizophragma Siebold & Zuccarini, Fl. Jap. 1: 58, t. 26. 1838. TYPE: Schizophragma hydrangeoides Siebold & Zuccarini 1838.