A new species of yellow camellia from southwestern China
Latest version published by PhytoKeys on 31 August 2021 PhytoKeys

Camellia debaoensis R.C. Hu & Y.Q. Liufu sp. nov. is described and illustrated as a new species from southwestern Guangxi, China. It is morphologically similar to Camellia pubipetala Y. Wan et S. Z. Huang, C. mingii S.X. Yang and C. tuyenquangensis D.V. Luong, N.N.H. Le & N. Tran, but it differs from these species in having glabrous young branches, glabrous petiole, glabrous sepals, glabrous petals, glabrous stamens and glabrous ovary, 10 petals, cylindrical ovary and style 3-lobed to 1/6 style length.

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Keywords

Camellia; China; limestone flora; taxonomy; Theaceae

Contacts

Who created the resource:

Yongqing Liufu

Who can answer questions about the resource:

Yongqing Liufu

Who filled in the metadata:

Yongqing Liufu

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Author
Renchuan Hu
Geographic Coverage

Debao County, Guangxi Zhuang Autonomous Region, CHINA.

Bounding Coordinates South West [-90, -180], North East [90, 180]
Temporal Coverage
Formation Period 2017-01-13
Project Data

Camellia debaoensis R.C. Hu & Y.Q. Liufu sp. nov. is described and illustrated as a new species from southwestern Guangxi, China. It is morphologically similar to Camellia pubipetala Y. Wan et S. Z. Huang, C. mingii S.X. Yang and C. tuyenquangensis D.V. Luong, N.N.H. Le & N. Tran, but it differs from these species in having glabrous young branches, glabrous petiole, glabrous sepals, glabrous petals, glabrous stamens and glabrous ovary, 10 petals, cylindrical ovary and style 3-lobed to 1/6 style length.

Title Camellia debaoensis (Theaceae), a new species of yellow camellia from limestone karsts in southwestern China
Funding 2017 Chinese Medicine Public Health Service Subsidy Special “National Chinese Medicine Resources Census Project” (GXZYZYPC17-3), the National Natural Science Foundation of China (31760088), the Guangxi Key Laboratory of Traditional Chinese Medicine Quality Standards Independent research topic (GZZZ201605), the Guangxi Science and Technology Project (guike AD16380013)
Study Area Description Camellia debaoensis grows at the entrance of one of the limestone caves in the karst region of Debao County (Fig. 3), Guangxi, China, accompanied by Ageratina adenophora (Sprengel) R. M. King & H. Robinson (Compositae), Boehmeria penduliflora Wedd. ex Long (Urticaceae), Fallopia multiflora (Thunb.) Harald (Polygonaceae), Flueggea virosa (Roxb. ex Willd.) Voigt (Euphorbiaceae), Pteris vittata L. (Pteridaceae), Ficus tikoua Bur (Moraceae), and Pueraria montana (Lour.) Merr. var. lobata (Willd.) Maesen et S. M. Almeida ex Sanjappa et Predeep (Fabaceae).

The personnel involved in the project:

Sampling Methods

Shrubs, 1–3 m tall. Young branches cylindrical, thick, glabrous, yellowish brown or grayish brown, and current year branchlets purplish red. Leaf blade leathery, ovate to long ovate, 6–13 × 3–5 cm, adaxial surface dark green and glabrous, abaxial surface pale green, brown glandular punctuate and veins sparsely spreading villous, veins abaxially elevated and adaxially impressed, secondary veins 5–6 on each side of midvein and connected at the proximal edge, base cuneate to broadly cuneate, apex caudate tip, margin serrulate; petiole 5–12 mm long, glabrous. Flowers subterminal axillary, solitary, 3–4.5 cm diam. Pedicel ca. 4(–6) mm long, thick; bracteoles 4 (or 5), unequal, 1–3 × 2–4 mm, appressed and covering pedicel, oval-triangle, leathery, green and glabrous, margin ciliolate. Sepals 5 (–6), semiorbicular to broadly ovate, 3–5 × 5–8 mm, leathery, glabrous, lightly yellow and occasionally with pink patches, fruiting stage green, margin ciliolate. Petals 10, in three whorls of 3–4 petals, golden yellow, glabrous; outer 3 or 4 petals suborbicular, occasionally with pink patches, 0.7–1.1 × 1 cm; inner orbicular-ovate or oval, 1.2–1.8 × 1.2–2.6 cm, basally connate for 1–3 mm. Stamens numerous, glabrous, ca. 2 cm long; anthers ca. 3 × 1mm; outer filaments connate ca. basal 1/4, ca. 1.6 cm, inner filaments nearly distinct, ca. 1.7 cm. Ovary cylindrical, ca. 2 mm in diam., glabrous, 3-loculed; style 2 cm long, glabrous, base connate, apex 3-lobed to 1/6 style length. Capsule triangle oblate, glabrous, 1.4–1.6 × 1.6–2.8 cm; Seeds brown, hemispherical, pubescent.

Study Extent Several specimens were collected at the entrance of one of the karst caves of Debao County, Jingde Town, Tuoliang village from 2015 to 2018, and were deposited in the herbaria GXMI, IBK, NHMG, KUN. The morpho-photographs of the plants were taken with a Panasonic LX100 camera. This material was confirmed as a new species based on detailed comparison with all other heretofore known yellow camellias, including specimens deposited at PE, KUN, IBSC, IBK, GXMI, HIB, SYS, GXMG, and description from botanical websites (e.g. http://www.cvh.ac.cn/, https://plants.jstor.org/). Herbarium acronyms follow Thiers (2018). The morphological characters were measured using M & G ARL96004.

Method step description:

  1. Several specimens were collected at the entrance of one of the karst caves of Debao County, Jingde Town, Tuoliang village from 2015 to 2018, and were deposited in the herbaria GXMI, IBK, NHMG, KUN. The morpho-photographs of the plants were taken with a Panasonic LX100 camera. This material was confirmed as a new species based on detailed comparison with all other heretofore known yellow camellias, including specimens deposited at PE, KUN, IBSC, IBK, GXMI, HIB, SYS, GXMG, and description from botanical websites (e.g. http://www.cvh.ac.cn/, https://plants.jstor.org/). Herbarium acronyms follow Thiers (2018). The morphological characters were measured using M & G ARL96004.
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