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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Ordo: Ericales

Familia: Theaceae
Tribus: Stewartieae
Genus: Stewartia
Sectiones: S. sect. Dialystyla – S. sect. Pseudocamellia – S. sect. Pteropetiolatae – S. sect. Racemosae – S. sect. Serratae – S. sect. Stewartia
Species: S. calcicola – S. cordifolia – S. crassifolia – S. densivillosa – S. laotica – S. malacodendron – S. medogensis – S. micrantha – S. monadelpha – S. obovata – S. ovata – S. pseudocamellia – S. pteropetiolata – S. rostrata – S. rubiginosa – S. serrata – S. sichuanensis – S. sinensis – S. sinii – S. tonkinensis – S. villosa – S. yunnanensis
Source(s) of checklist:
Checklist based uncritically on accepted species according to Li (1996)
Name

Stewartia L., Sp. Pl. 2: 698 (1753).

Type species: S. malacodendron L.

Synonyms

Homotypic
Cavanilla Salisb., Prodr. Stirp. 385 (1796) non J.F.Gmel. (1792), nec Thunb. (1792)
Malachodendron Mitchell, Diss. Brev. Bot. Zool. 38 (1769).
Stuartia L'Hér., Strip. Nov 153 (1791), orth. var.
Heterotypic
Hartia Dunn, Hooker's Icon. Pl. 28: ad t. 2727 (1902).
Type species: H. sinensis Dunn

Note:

The spelling Stewartia is sometimes considered a misprint for Stuartia. However, Linnaeus used the same spelling, Stewartia, repeatedly from Species Plantarum, ed. 1 until his death and can hardly be interpreted as an error. See IPNI.
References
Primary references

Linnaeus, C. 1753. Species Plantarum. Tomus II: 698. Reference page.

Additional references

Bean, W.J. 1980. Trees and Shrubs Hardy in the British Isles 4: 507–513.
Chang, H. & Ren, S. 1998. Theaceae/Theoideae. Flora Reipublicae Popularis Sinicae 49 (3).
Li, J. 1996. A Systematic Study on the Genera Stewartia and Hartia (Theaceae). Acta Phytotaxonomica Sinica 34(1): 48–67. PDF Reference page.
Spongberg, S.A. 1974. A review of deciduous-leaved Stewartia (Theaceae). Journal of the Arnold Arboretum 55(2): 182–214. JSTOR BHL Reference page.

Links

International Plant Names Index. 2016. Stewartia (Theaceae). Published online. Accessed: Apr. 18 2016.

Vernacular names
日本語: ナツツバキ属

Stewartia (sometimes spelled Stuartia[1][2][3][4]) is a genus of 8-20 species of flowering plants in the family Theaceae, related to Camellia. Most of the species are native to eastern Asia in China, Japan, Korea, Laos, Myanmar, Thailand, and Vietnam, with two (S. malacodendron, S. ovata) in southeast North America, from Virginia and Kentucky south to Florida and Louisiana.[3][5]

They are shrubs and trees, mostly deciduous, though some species (e.g. S. pteropetiolata) are evergreen; the evergreen species form a genetically distinct group and are split into a separate genus Hartia by some botanists,[5] but others retain them within Stewartia.[2][6] The Asian species include both shrubs and trees, growing to 3–20 m tall, while the American species are shrubs growing 3–5 m tall, rarely becoming small trees. The bark is very distinctive, smooth orange to yellow-brown, peeling in fine flakes. The leaves are alternately arranged, simple, serrated, usually glossy, and 3–14 cm long. The flowers are large and conspicuous, 3–11 cm diameter, with 5 (occasionally 6-8) white petals; flowering is in mid to late summer. The fruit is a dry five-valved capsule, with one to four seeds in each section.[3][4][6]

The species are adapted to acidic soils, and do not grow well on chalk or other calcium-rich soils. They also have a high rainfall requirement and will not tolerate drought.[3]

Etymology

The genus was named in 1753 by Carl Linnaeus to honour John Stuart, 3rd Earl of Bute. Owing to a transcription error, Linnaeus was given the name as 'Stewart',[3] and consequently spelled the name "Stewartia" (and continued to do so in all his subsequent publications). Some botanists and horticulturists, mainly in the past[7][8][9] but still widely in the UK[1][2][3][4] have interpreted Article 60 of the International Code of Botanical Nomenclature to consider "Stewartia" an orthographical error to be corrected to Stuartia, but this type of correction has been discouraged by changes to the code in recent times.

During the 19th century, the spelling Stuartia was "almost universally" used.[3] However, the original spelling "Stewartia" has been accepted by virtually all systematic botanists in recent treatments of the family [10][11] and genus [5][12][13][14] as well as in numerous influential horticultural publications.[15]
Cultivation and uses

Several species of Stewartia are grown as ornamental plants for their very decorative smooth orange bark and their flowers produced at a time of year when few other trees are in flower.[3]
Species

The following species are accepted:[16]

Stewartia acutisepala P.L.Chiu & G.R.Zhong
Stewartia calcicola T.L.Ming & J.Li
Stewartia cordifolia (H.L.Li) J.Li & T.L.Ming
Stewartia crassifolia (S.Z.Yan) J.Li & T.L.Ming
Stewartia densivillosa (Hu ex Hung T.Chang & C.X.Ye) J.Li & T.L.Ming
Stewartia laotica (Gagnep.) J.Li & T.L.Ming
Stewartia malacodendron L.
Stewartia medogensis J.Li & T.L.Ming
Stewartia micrantha (Chun) Sealy
Stewartia monadelpha Siebold & Zucc.
Stewartia obovata (Chun ex Hung T.Chang) J.Li & T.L.Ming
Stewartia ovata (Cav.) Weath.
Stewartia pseudocamellia Maxim.
Stewartia pteropetiolata W.C.Cheng
Stewartia rostrata Spongberg
Stewartia rubiginosa Hung T.Chang
Stewartia serrata Maxim.
Stewartia sichuanensis (S.Z.Yan) J.Li & T.L.Ming
Stewartia sinensis Rehder & E.H.Wilson
Stewartia sinii (Y.C.Wu) Sealy
Stewartia tonkinensis (Merr.) C.Y.Wu ex J.Li
Stewartia villosa Merr.

References

Sprague, T.A. (1928). The correct spelling of certain generic names. III. Kew Bulletin 1928: 337-365.
Royal Botanic Gardens, Kew. Vascular Plant Families and Genera: Theaceae Archived 1997-01-02 at the Wayback Machine
Bean, W. J. (1980). Trees and Shrubs Hardy in the British Isles 4: 507-513. ISBN 0-7195-2428-8.
Rushforth, K. (1999). Collins Photographic Guide to Trees. ISBN 0-00-220013-9.
Li, J., Del Tredici, P., Yang, S., & Donoghue, M. J. (2002). Phylogenetic relationships and biogeography of Stewartia (Camellioideae, Theaceae) inferred from nuclear ribosomal DNA ITS sequences. Rhodora 104: 117-133 (pdf file).
Flora of China draft account of Theaceae
L'Héritier de Brutelle, C. L. (1785). Stirpes Novae aut Minus Cognitae (cited by W. J. Bean 1980).
Siebold, P. F. von, & Zuccarini, J. G. (1835). Flora Japonica 1: 181, t.96. Facsimile.
Dippel, L. (1889). Handbuch der Laubholzkunde. Darmstadt. Facsimile.
Chang, H. & Ren, S. (1998). Theaceae/Theoideae. Flora Reipublicae Popularis Sinicae 49 (3).
Stevens, P. F., Dressler, S. & Weitzman, A. L. (2004). Theaceae. In K. Kubitzki (ed.), Families and Genera of Vascular Plants 6: 463-471.
Spongberg, S. A. (1974). A review of deciduous-leaved Stewartia (Theaceae). Journal of the Arnold Arboretum 55: 182-214.
Li, J. (1996). Systematic study on the genera Stewartia and Hartia (Theaceae). Acta Phytotaxonomica Sinica 34: 48–67.
Prince, L. M. (2002). Circumscription and biogeographic patterns in the Eastern North American-East Asian genus Stewartia (Theaceae: Stewartieae): insight from chloroplast and nuclear DNA sequence data. Castanea 67: 290-301.
Huxley, A., ed. (1992). New Royal Horticultural Society Dictionary of Gardening.
"Stewartia L." Plants of the World Online. Board of Trustees of the Royal Botanic Gardens, Kew. Retrieved 1 July 2021.

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