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(First upload on September 10 2014. Last on January 31 2024) [ 日本語 | English ]

Hydrangea serrata (Thunb.) Ser.






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

Hydrangea Gronov. (アジサイ)
Hydrangea serrata (Thunb.) Ser. (ヤマアジサイ, s.l.), mountain hydrangea or tea of heaven
Lifeform: deciduous shrub < 2 m high
Distribution: eastern Asia
Habitat: mainly establishing along valleys and on mesic forest edges
Chromosome number: 2n = 36
var. acuminata (Siebold et Zucc.) Nakai (サワアジサイ)
var. angustata (Franch. et Sav.) H. Ohba (アマギアマチャ)
var. australis T. Yamaz. (ナンゴクヤマアジサイ)
var. japonica (Siebold) H. Ohba et S. Akiyama (ベニガク)
var. minamitanii H. Ohba (ヒュウガアジサイ)
var. serrata (ヤマアジサイ, 山紫陽花)
Distribution: southern Cnina - Taiwan - Japan (south to Kanto District)
Synonyms:

Hydrangea macrophylla (Thunb.) Ser. ssp. serrata (Thunb.) Makino

Hydrangea macrophylla (Thunb.) Ser. var. acuminata sensu Makino
f. belladonna Kitam. (マイコアジサイ)
f. plena (Makino) Makino ex Sugim. (ヤエノヤマアジサイ)
f. prolifera (Regel) Nakai (シチダンカ) = cv. prolifera

var. thunbergii (Siebold) H. Ohba (アマチャ)
Distribution: Chubu and Kanto Districts
Use: medicine
var. yesoensis (Koidz.) H. Ohba (エゾアジサイ, 蝦夷紫陽花)
Distribution: southern Korea - Japan (north to Hokuriku District)
Synonyms:

Hydrangea macrophylla (Thunb.) Ser. ssp. yesoensis (Koidz.) Kitam. Hydrangea macrophylla (Thunb.) Ser. var. acuminata (Siebold et Zucc.) Makino f. yesoensis (Koidz.) Ohwi

Hydrangea macrophylla (Thunb.) Ser. var. megacarpa Ohwi
Hydrangea serrata (Thunb.) Ser. ssp. yesoensis (Koidz.) Kitam.
Hydrangea serrata (Thunb.) Ser. var. megacarpa (Ohwi) H. Ohba, often used
Hydrangea belzonii Siebold et Zucc.
f. cuspidata (Thunb.) Nakai (ニワアジサイ)

索引

Hydrangea serrata in Hokkaido

var. yesoensis (エゾアジサイ)

ST1 ST2 ST3
ST4 ST5 ST6
[1/2] at the western slope of Mount Yotei (羊蹄山), central Hokkaido, on June 28 2014. [3-5] in the park of Nakatonbetsu Limestone Caves for Communication with Nature (中頓別鍾乳洞自然ふれあい公園), northern Hokkaido, on August 28 2015. [6] in the Forest of Hokkaido People (道民の森), 3rd River, Kamui-jiri, Aoyama, Tobetsu Town, on July 18 2022.

var. thunbergii (アマチャ)

ST1 ST2 ST3
[1-3] on a fruticetum in Hokkaido University Botanic Garden on September 30 2023.

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