比杜普山茶 Camellia bidoupensis Truong, Luong & TranCamellia bidoupensis

Camellia bidoupensis Truong,Luong & Tran  Section: Theopsis, International Camellia Journal52: 125, (2020), TYPE: Vietnam. Vietnam, Lam Dong Province: Bidoup-Nui Ba National Park, evergreen forest, at altitudes of 1600 m,22/12/2018 (fl.), Truong Quang Cuong, Luong Van Dung, Do Cong Thuan,Trinh Van Muoi & Tran Hoang Than, DL.181201(Holotype, DLU!);DL.190401 (Paratype, DLU!)

The specimen was first discovered by Truong Quang Cuong, Luong Van Dung, Do Cong Thuan, Trinh Van Muoi and Tran Hoang Than in 2019 in Bidoup Nui Ba National Park. In 2020, Truong Quang Cuong, Luong Van Dung, Le Van Son, Tran Ninh, Anthony Curry published in the International Camellia Journal No. 52 with the scientific name Camellia bidoupensis, bearing the name of the place where the specimen was first discovered.

Plant Small to medium evergreen tree, 3–7 m tall, bark brown-gray; branches young pubescent and becoming glabrous. Leaves stalked, broad voide or elliptic, 8-12 cm long, 3.5-5.5 cm wide, thickly, coriaceous; apex acute to attenuate, base near rounded to obtuse, margins regularly serrate; dark green and shiny above, paler green below; glabrous on both faces; midribs and lateral veins sunken above, protruding below; secondary venation pinnate, with 7-11 pairs of veins; petiole falcate, slightly curved, round, thin, of the same pale blue-purple colour, 8-12 mm long, glabrous. Flowers solitary or geminate, axillary, 2-2.5 cm diameter; pedicel 4-5 mm long, glabrous, light green to yellowish green; bracts 3-(4), scales, 2-3.5 mm long, 2.5-4 mm wide, grey, glabrous, deciduous. Sepals 5, orbicular or subglobose, 4.5- 5.5 mm long, 4-5 mm wide, pale green, glabrous, persistent. Petals 5-6, pale yellow, purple stripes at the base, glabrous, the outer whorl 2-3 petals, subglobose to broadly obovate, 8-11 mm long, 7-12 mm wide; the inner whorl 3 petals, broadly obovate, 1-1.5 cm long, 0.7-1.2 cm wide, united with outermost filaments 1.5-3 mm at the base.Androecium numerous stamens in 3-4 circles, filaments 1.0-1.3 cm long, light yellow, glabous, outer filament united for 3-4.5 mm from the base and form a cup; anthers yellow, ca.1.5 mm. Gynoecium 3 loculi, ovary ovate, 2.5-3 mm long, 1.5-2 mm wide, glabous; style 3, free to the base, 2-3 mm long, glabrous. Capsule curved to one side, asymmetrically ovoid, 1-(2) loculed with 1 seeded, columella nearly abortive, pericarp 1-1.5 mm thick, glabrous, 3-3.2 cm long, 2.4-2.8 cm wide. Seed ellipsoidal or subglobose, 3-3.5 cm long, 2-2.5 cm wide, glabrous.

Etymology: The specific epithet refers to the type location, Bidoup Nui Ba National Park, in Vietnam where the first species discovered. Distribution and ecology: This species was found in the evergreen forest at altitudes of 1600m, trees scattered along the rocky mountains. The flower season from November to January of the next year, fruit season from April to June.

Typus: Vietnam, Lam Dong, Bidouop Nui Ba National Park, evergreen forest, at altitudes of 1600 m, Truong Quang Cuong, Luong Van Dung, Do Cong Thuan, Trinh Van Muoi, Tran Hoang Than DL.181201 (Holotypus, DLU!), DL.190401 (Paratype, DLU!).

Taxonomic remarks: Camellia bidoupensis possesses some morphological characteristics common to the species belonging to Section Theopsis such as flowers axillary, solitary or paired, small. Bracteoles (2 or) 3–5(–8), persistent. Sepals 5, basally ± connate. Petals 5(–7), white, basally connate and adnate with androecium. Stamens in 2 whorls, glabrous; outer filament whorl basal 2/3 usually connate into a tube. Gynoecium glabrous. Ovary 3(–5)-loculed. Capsule 1(–4)-loculed, usually 1-seeded, rarely more; columella nearly abortive; pericarp ca. 1 mm thick, leathery, splitting into 3 valves (Sealy 1958, Minh & Bartholomew 2007). Therefore, Camellia bidoupensis is classified into the section Theopsis. Among species within the Sect. Theopsis occurring in Vietnam and China, the morphologically closest species to this new species is Camellia quangcuongii. The main differences between the two species are young branches pubescent (C.quangcuongii young branches glabrous); leaf blade shape broad voide or elliptic (C.quangcuongii leaf blade oblong-elliptic or ovate-lanceolate), abaxial glabrous (C.quangcuongii abaxial sparse hair); flower diameter 2-2.5 cm (C.quangcuongii flower diameter 4–5 cm), petal color cream with purple stripes at the base (C.quangcuongii petal color white).

 VIETNAM-Lam Dong, Bidouop Nui Ba National Park

比杜普山茶 Camellia bidoupensis Truong,Luong & Tran 组：连蕊茶组 Theopsis。《国际山茶会志》52: 125, (2020)。越南林同省Bidoup-Nui Ba 国家公园，常绿阔叶林，海拔1600米，22/12/2018 (花标本), Truong Quang Cuong, Luong Van Dung, Do Cong Thuan, Trinh Van Muoi & Tran Hoang Than, DL.181201 (主模式, DLU); DL.190401 (副模式, DLU)。

该标本由 Truong Quang Cuong、Luong Van Dung、Do Cong Thuan、Trinh Van Muoi 和 Tran Hoang Than 于 2019 年在比杜普努伊巴国家公园（Bidoup Nui Ba National Park）首次发现。2020 年，Truong Quang Cuong、Luong Van Dung、Le Van Son、Tran Ninh、Anthony Curry 在《国际山茶会志》第 52 期上发表了学名为 Camellia bidoupensis 的文章，种加词为标本首次发现地的名称。

植株：小到中型常绿乔木，高3-7m，树皮灰褐色；枝幼时被短柔毛，后逐渐无毛。叶：具柄，宽椭圆形或椭圆形，长8-12cm，宽3.5-5.5cm，厚革质；叶尖锐尖至渐尖，叶基近圆形至钝圆形，叶缘具规则锯齿；叶面暗绿色，具光泽，叶背浅绿色；叶两面光滑无毛；叶主脉及侧脉在叶面凹陷，叶背凸起；羽状脉7-11对；叶柄镰刀形，稍弯曲，圆，纤细，淡蓝紫色，长8-12mm，无毛。花：1-2朵腋生，花径2-2.5cm；花梗长4-5mm，无毛，淡绿色或黄绿色，苞片3-(4)，长2-3.5mm，宽2.5-4mm，灰色，无毛，花后逐渐脱落。萼片5，扁圆形或近圆形，长4.5-5.5mm，宽4-5mm，淡绿色，无毛，宿存。花瓣5-6枚，淡黄色，花瓣基部具紫色条纹，无毛，外轮2-3枚花瓣近圆形至宽倒卵形，长8-11mm，宽7-12mm，内轮3枚花瓣宽倒卵形，长1-1.5cm，宽0.7-1.2cm，基部与雄蕊连生1.5-3mm。雄蕊多，3-4轮，花丝长1.0-1.3cm，淡黄色，无毛，外轮花丝基部连生3-4.5mm，成杯状，花药黄色，约1.5mm。雌蕊3室，子房卵圆形，长2.5-3mm，宽1.5-2mm无毛，花柱3，离生，长2-3mm，无毛。蒴果弯曲到一侧，不对称卵圆形，1-（2）室，种子1粒，中轴近退化，果皮厚1-1.5mm，无毛，长3-3.2cm，宽2.4-2.8cm。种子椭圆形或近圆形，长3-3.5cm，宽2-2.5cm，无毛。

词源：该种的种加词指的是该种的地理分布位置，越南比豆普奴伊巴国家公园是该种首次发现的地方。分布与生境：本种零散分布于落基山脉海拔1600m的常绿林中。花期11月至次年1月，果期4月至6月。

模式标本：越南，林同省，比豆普奴伊巴国家公园，海拔1600m的常绿林中，采集人Truong Quang Cuong，Luong Van Dung，Do Cong Thuan，Trinh Van Muoi，Tran Hoang Than DL.181201 (正模式標本,DLU)，DL. 190401(副模式标本,DLU)。

分类学特征：比豆普茶Camellia bidoupensis的部分形态学特征与连蕊茶组的种接近，比如花小，1-2朵腋生。苞片(2)3–5(–8)宿存，萼片5，多少合生。花瓣5（–7），白色，基部与雄蕊连生。雄蕊2轮，无毛，外轮花丝约2/3合生成管状.雌蕊无毛。子房3（–5）室。蒴果1（–4）室，通常1种子，稀更多；中轴近退化；果皮厚约1mm，革质，3爿开裂(Sealy 1958, Min & Bartholomew 2007)。基于此, 比豆普茶Camellia bidoupensis归类于连蕊茶组SectionTheopsis，该组资源分布于越南和中国，从形态学特征来看，接近于本组新种Camelliaquangcuongii。两种的主要区别在比豆普茶嫩枝被毛（C. quangcuongii的嫩枝无毛）；叶宽椭圆形或椭圆形（C. quangcuongii的片叶长椭圆形或卵状披针形），叶背无毛（C. quangcuongii的叶背被疏毛）；花径2-2.5cm（C. quangcuongii的花径4–5cm），花瓣基部具紫色条纹。

越南林同省Bidoup-Nui Ba 国家公园