Mahonia oiwakensis

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Mahonia oiwakensis
Mahonia oiwakensis.jpg
Mahonia oiwakensis
Mahonia oiwakensis 1.jpg
Flowers of Mahonia oiwakensis
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Ranunculales
Family: Berberidaceae
Genus: Mahonia
Species:
M. oiwakensis
Binomial name
Mahonia oiwakensis
Synonyms[2][3][4]
Species synonymy
  • Berberis caelicolor (S. Y. Bao) Laferr.
  • Berberis discolorifolia (Ahrendt) Laferr.
  • Berberis lomariifolia (Takeda) Laferr.
  • Berberis lomariifolia var. estylis (C. Y. Wu ex S. Y. Bao) Laferr.
  • Berberis oiwakensis (Hayata) Laferr.
  • Mahonia alexandri C. K. Schneider
  • Mahonia caelicolor S. Y. Bao
  • Mahonia discolorifolia Ahrendt
  • Mahonia hainanensis C. M. Hu, Ze X. Li & F. W. Xing
  • Mahonia lomariifolia Takeda
  • Mahonia lomariifolia var. estylis C. Y. Wu ex S. Y. Bao
  • Mahonia morrisonensis Takeda

Mahonia oiwakensis is a species of plant in the barberry family, Berberidaceae. It is native to Taiwan, China ( Guizhou, Hong Kong, Sichuan, Xizang (Tibet) and Yunnan) and Myanmar, where it occurs at elevations of 600 to 3800 m.[2] It has recently been found naturalized in South Africa.[5]

Nomenclature[]

This species has long been known by the name Mahonia lomariifolia, published by Takeda in 1917.[6] Under that name, it was considered to occur only in mainland China, while on Taiwan, a second species was found, known as M. oiwakensis. Modern taxonomic sources unite the two as a single species,[2] but as the latter name was published a year earlier by Hayata,[7] it has priority and is thus the accepted name. In recognition of the morphological differences between the Taiwanese and mainland Chinese plants, Shaw[8] recognized the two as subspecies of Mahonia oiwakensis: M. oiwakensis subsp. oiwakensis in Taiwan and M. oiwakensis subsp. lomariifolia in mainland China. In addition, a plant collected in Yunnan with especially narrow leaflets was described as a new variety: Mahonia oiwakensis subsp. lomariifolia var. tenuifoliola.[8]

Description[]

Mahonia oiwakensis is a shrub or tree up to 7 m tall. Leaves are up to 45 cm long, compound with 12-20 pairs of leaflets plus a larger terminal one, dark green above, yellow-green below. The inflorescence is a fascicled raceme up to 25 cm long. The berries are egg-shaped, dark blue, sometimes almost black, up to 8 mm long.[2][7]

Hybrids[]

Mahonia oiwakensis subsp. lomariifolia is one parent of the important garden hybrid Mahonia x media, which includes popular cultivars such as 'Charity', 'Winter Sun' and 'Lionel Fortescue' (the other parent is Mahonia japonica).[9] It is also a parent of the cultivar 'Arthur Menzies', though with Mahonia bealei as the other parent.[10] In the wild in Taiwan, M. oiwakensis subsp. oiwakensis appears to hybridize with wild Mahonia japonica.[8]

M. oiwakensis subsp. lomariifolia has gained the Royal Horticultural Society’s Award of Garden Merit.[11][12]

References[]

  1. ^ Pan, F.J. (1998). "Mahonia oiwakensis". IUCN Red List of Threatened Species. 1998: e.T34757A9887847. doi:10.2305/IUCN.UK.1998.RLTS.T34757A9887847.en. Retrieved 17 November 2021.
  2. ^ a b c d Flora of China v 19 p 774,
  3. ^ Tropicos
  4. ^ The Plant List
  5. ^ Jaca, T. P. 2017. Chinese hollygrape (Mahonia oiwakensis): newly detected weed. South African Plant Invaders Atlas (SAPIA) News 45:2-3. Last accessed February 15, 2018, from http://www.arc.agric.za/ARC%20Newsletters/SAPIA%20NEWS%20No.%2045,%20July%202017.pdf.
  6. ^ Takeda, Hisayoshi (1917). "Contributions to the Knowledge of the Old World Species of the Genus Mahonia". Notes from the Royal Botanic Garden, Edinburgh. 6 (29–30): 209–248 – via Biodiversity Heritage Library.
  7. ^ a b Hayata, Bunzo (1916). "Contributions to the Flora of Formosa". Icones Plantarum Formosanarum Nec non et Contributiones Ad Floram Formosanam. 6: 1–163 – via Biodiversity Heritage Library.
  8. ^ a b c Shaw, Julian (2011). "Developments in Mahonia" (PDF). The Plantsman. New Series. 10: 44–49.
  9. ^ Brickell, C.D. (1979). "The hybrids between Mahonia japonica and M. lomariifolia". The Plantsman. 1: 12–20.
  10. ^ Witt, J.A. (1967). "Mahonia 'Arthur Menzies'". Arboretum Bulletin Washington. Spring: 14–15.
  11. ^ "RHS Plantfinder - Mahonia oiwakensis subsp. lomariifolia". Retrieved 1 April 2018.
  12. ^ "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 62. Retrieved 25 March 2018.
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