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(First upload on September 11 2014. Last on July 27 2025) [ 日本語 | English ]

Hydrangea Gronov. (アジサイ) Hydrangea macrophylla (Thunb.) Ser. Ajisai (アジサイ, 紫陽花), bigleaf hydrangea, French hydrangea, lacecap hydrangea, mophead hydrangea, penny mac or hortensia Lifeform: deciduous shrub < 3 m high f. hortensia (Lam.) Rehder (セイヨウアジサイ): originating from Japan → breeding in Europe f. macrophylla (アジサイ, ホンアジサイ): original race = f. normalis f. normalis (E. H. Wilson) H. Hara (ガクアジサイ) Synonyms: Hydrangea macrophylla (Thunb.) Ser. var. hattoriana Kitam. f. nuda Konta et S.Matsumoto (フチナシガクアジサイ) f. rosea E. H. Wilson (ガクソウ) Cultivars All Summer Beauty, a cold-hardy, floriferous mophead Alpengluhen, a deep-red colored mophead Altona, agm (Royal Horticultural Society's Award of Garden Merit) Ami Pasquier, a floriferous, wine pink to blue mophead Bailmer (marketed as Endless Summer, a perpetual-blooming, pink to blue mophead Beaute Vendomoise, a giant whitish-pink lacecap Blaumeise, a Swiss-bred Teller blue lacecap

Blue Bonnet, a hardy, blue mophead Blue Wave, a robust light pink to light blue lacecap Blushing Bride, a cold-hardy, ever-blooming white mophead Europa, agm Forever Pink, a pink mophead Generale Vicomtesse de Vibraye, agm, a cold-hardy, French-bred pink to blue mophead Hamburg, a deep-colored pink to blue mophead Harlequin, a picoteed pink to purple mophead Lanarth White, agm Lilacina, a cold-hardy, disease-resistant pink to blue lacecap Madame Emile Mouillere, agm Marechal Foch, an old-fashioned pink to blue mophead Mariesii Grandiflora Mariesii Lilacina, agm Mariesii Perfecta

Mowe, agm Nigra Nikko Blue, a popular, cold-hardy pink to blue mophead Pia, a dwarf pink to purplish-blue mophead Penny Mac, a cold-hardy, pink to blue mophead Soeur Therese, a hardy, robust white mophead Taube, a Swiss-bred Teller, pink to blue lacecap Tokyo Delight, agm Twist-N-Shout, an ever-blooming, hardy pink to blue lacecap Veitchii, agm, an exceptionally disease-resistant, sun-tolerant white lacecap Westfalen, agm

Hydrangea macrophylla cultivars

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Hokkaido

race f. normalis (ガクアジサイ系)

01 02 03 04
05 06 07 08
[1-3] in West and North Ward, Sapporo, on July 18 2014. [4] between Ono Pond and Faculty of Engineer, Hokkaido University, on July 31 2017. [5] under a street tree in N13/W4, North Ward, Sapporo, on July 20 2019. [6] cv. Akanegumo (茜雲) in Shin-Kotoni Jinja (Shrine), North Ward, Sapporo, on July 25 2020. [7] in front of Asami Pharmacy on N13/W4, North Ward, Sapporo, on July 23 2022. [8] cv. dance party along a paved road near the office building for Wakayama Experimental Forest of Hokkaido University, western Japan, on June 27 2024.

race f. hortensia (セイヨウアジサイ系)

01 02 03 04
05 06 07
[1-5] in West and North Ward, Sapporo, on July 18 2014. [6/7] under a street tree in N26/E1, East Ward, Sapporo. [6] on July 13 2018. [7] on July 17 2018.

Tokyo

1 2 3 4
5 6 7 8
[1-3] f. normalis. [4] cv. Sumida-no-hanabi (墨田の花火, firework on Sumida) in Oi Pier Seaside Park, Tokyo, on June 3 2016. [5/6] cv. Uzu-ajisai (ウズアジサイ, オカメアジサイ, オタフクアジサイ). [1-3, 5/6] at the imperial gardens in the former lawn (Shiba) detached palace, Tokyo, on May 29 2015. [7] f. normalis cv. maculata (フイリガクザジサイ) in the Koishikawa Botanical Garden (小石川植物園), the University of Tokyo, on March 16 2017. [8] ] rounded leaves on a small flower garden in front of St. Ignatius Church, Chiyoda Ward, Tokyo, on May 26 2017 (later becoming purple).

cv. lemon wave

1 2 3
[1-3] in a garden adjacent to Kamisatsunai Community Exchange Hall in Nakasatunai Village, south-central Hokkaido, on June 26 2025.

Hydrangea arborescens L. transplanted in Hokkaido

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Amerikanorinoki (アメリカノリノキ, 亜米利加糊木), smooth hydrangea, sevenbark or sheep flower

Lifeform: deciduous shrub Distribution: eastern United States

Habitat: hardwood forests and often common along woodland road banks and streams Use: ornamental

1 2 3
4 5 6
[1-3] in front of Keio Plasa Sapporo Hotel near JR Sapporo Station on August 28 2023. [4-6] under a street tree in N10/W4, North Ward, Sapporo, on September 21 2023.