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This genus is accepted, and its native range is SE. China, Korea, Japan.
Diabelia serrata

[KBu]

Landrein, S., Farjon, A. (2020). A monograph of Caprifoliaceae: Linnaeeae. Kew Bulletin 75: 1 doi:10.1007/s12225-018-9762-5

Distribution
Diabelia species are very widespread and abundant in Japan and are only absent on the island of Hokkaido. All four species grow in sympatry and form frequent hybrids. Nevertheless, D. serrata is restricted to south and central Honshu as well as Shikoku and Kyushu, whereas D. stenophylla is mostly located in Honshu and Shikoku (very rare in Kyushu) and reaches the most northern latitudes. Diabelia sanguinea is found in central Honshu and grows at higher elevation than D. spathulata in the Japanese Alps. Diabelia spathulata is widespread in central Honshu and Shikoku but rare in Kyushu and Korea. The populations of D. serrata and D. stenophylla in Zhejiang, China are disjunct from the Japanese populations
Morphology Branches
Branches terete, pith white sometimes hollow
Morphology General Buds
Winter buds exposed, with several pairs of scales
Morphology General Habit
Deciduous shrubs, 1 – 3 m high
Morphology Leaves
Leaf blade abaxially hairy especially in the axils of the primary veins, adaxially glabrescent Leaves ovate or elliptic, 5 – 80 mm long, 3 – 38 mm wide, acute to long acuminate at the apex, rounded to cuneate at base
Morphology Leaves Leaf lamina Leaf margin
Margin sub-entire or coarsely serrate often reddish when mature
Morphology Leaves Petiole
Petioles 1 – 3 mm long
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, didynamous, inserted in lower third of the corolla tube
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers oblong, 1.8 – 3 mm long, yellowish white
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Filaments deflexed towards the dorsal side of the corolla
Morphology Reproductive morphology Flowers Calyx
Calyx of 5 spreading reddish and accrescent sepals, adaxial sepal sometimes reduced and smaller than the others (2 – 5 mm long), rarely absent
Morphology Reproductive morphology Flowers Corolla
Corolla 9 – 35 mm long, white, yellow, red or the colours in between Lower part of the corolla tube narrow tubular or infundibuliform, 1 – 2 mm in diameter, 5 – 15 mm long, gradually becoming inflated at the mouth Corolla mouth bearded and with strong reticulate orange markings Corolla tube slightly saccate ventrally, oblique, truncate at base sometimes with a bulge located 1 – 2 mm above the base
Morphology Reproductive morphology Flowers Epicalyx
Epicalyx of 6 lobes (2 bracts per inflorescence and 2 bracteoles for each flower) Episepals 1 – 5 mm long glabrous or long ciliate
Morphology Reproductive morphology Flowers Gynoecium
Style 13 – 30 mm, filiform, as long as the corolla tube or exserted; stigmas capitate, white and papillose
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary slender, cylindrical to fusiform and 5 – 12 mm long Ovary trilocular, longitudinally ribbed but not dorsi-ventrally compressed, sterile locules with ovules inserted in the middle, fertile locule with a single ovule
Morphology Reproductive morphology Flowers Nectaries
Nectariferous zones 1 – 2 mm in diameter; nectary cushion flat and fused to the corolla tube or clavate and apically free from the corolla tube
Morphology Reproductive morphology Fruits
Fruit a 1-seeded achene crowned with persistent and accrescent sepals, sometimes with an apical sterile neck
Morphology Reproductive morphology Inflorescences
Inflorescence of terminal paired flowers at the end of a 1 – 5 mm long peduncle
Morphology Reproductive morphology Seeds
Seeds narrow cylindrical, 3 – 8 mm long.
Note
Diabelia referring to the genus Abelia, which it resembles but differing by the inflorescences of terminal paired flowers.
Type
Diabelia serrata (Siebold & Zucc.) Landrein = Abelia serrata Siebold & Zucc.
Vernacular
Tsukubaneutsugi 衝羽根空木, meaning shuttle-cock shrub with hollow stems in Japanese.

[KBu]
Use
Despite being very attractive and diverse morphologically, Diabelia species are not widely cultivated and can only be found in botanical gardens.

Native to:

China Southeast, Japan, Korea

Diabelia Landrein appears in other Kew resources:

First published in Phytotaxa 3: 35 (2010)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0