夷灵山茶 Camellia dilinhensis Ninh & V.D.LuongCamellia dilinhensis

Camellia dilinhensis Ninh & V.D. Luong, Section: Obovoideae, International Camellia Journal45: 87 (2013), Type: Vietnam, Lam Dong Province: Di Linh, evergreen forest, at altitudes of 850-900 m,22/10/2012, Dung & Ninh121001 (Holotype, Isotype HNU). The specimen was first discovered by Do Van Thinh and Luong Van Dung in 2012 in Di Linh district, Lam Dong province. In 2013, Tran Ninh and Luong Van Dung published in the International Camellia Journal with the scientific name Camellia dilinhensis, the Vietnamese name is Tra di Linh, bearing the name of Di Linh district, where the specimen was first discovered.

Small tree, 3-4 m high; young branches glabrous. Leaves stalked, petioles 1.4 -1.9 cm; blades oblong-elliptic or elliptic, 16.0-24.5 cm. long, 5.5-9.5 cm. wide, deep green above, light green below; midribs sunken above and protruding below, glabrous on both sides: base cuneate, apex acuminate, leaf margin shallowly serrulate; lateral veins 8-14 pairs. Flowers light yellow, 3.5-3.7 cm. in diameter, 1-3 in each group in axillary; pedicels 5-7 mm long, bearing two or three tiny bracteoles, glabrous. Sepals 5, scale shape nearly rounded, 4-8 mm. high, 8-11mm. wide, glabrous. Petals 8 -9, nearly rounded or elliptic, 1.2 -1.4 cm. wide, 1.5-1.7 cm. high, glabrous. Androecium over 350 stamens, 5-9 mm. long, glabrous, outer filaments united from the base and forms a short cup, united with petals 2-2.5 mm. at the base. Gynoecium 3, ovaries cylinder, pubescent, 3-4 mm wide, 7-8 mm high, 3 loculi; styles 3, free to the base, 5 mm. long, pubescent. Fruits obovoid, immature fruits scarred white hairy; mature fruits glabrous, 3.5-4 cm. wide, 5.5-6.5 cm. high, 3 loculi, 5-6 seeds in each loculus. Seeds cuneate, 7-10 mm. high, 8-11 mm. wide, pubescent.

Blooming season: winter This species was collected in evergreen forest of Dilinh district (Lamdong province), at altitudes of 850-900 m.

Typus: Vietnam, Lam Dong, Dilinh, evergreen forest, at altitudes of 850 -900 m, 22/10/2012, Dung, Ninh 121001 (Holotypus, Isotypus HNU).

Taxonomic remarks: Camellia dilinhensis possesses some morphological characteristics common to the species belonging to Section Chrysantha Chang such as flowers axillary, medium large, yellow, pedicellate but there are some differences: pedicels bear two or three tiny bracteoles (Sect. Chrysantha have 5-7 bract.); ovary cylindrical (Sect. Chrysantha ovary globose); fruits obovoid (Sect. Chrysantha fruits globose). Based on these differences we affirm that this species belongs to a new Section and will be named Obvoidea Tran et Luong, Sect. nov.

Vietnam, Lam Dong Province: Di Linh

夷灵山茶Camellia dilinhensis Ninh & V.D. Luong 组：Obovoideae组。《国际山茶会志》 45: 87 (2013)。越南林同省夷灵县，常绿林，海拔850-900米，22/10/2012, Dung & Ninh 121001 (主模式, 等模式 HNU)。该标本由 Do Van Thinh 和 Luong Van Dung 于 2012 年在林同省 Di Linh 县首次发现。2013 年，Tran Ninh 和 Luong Van Dung 在《国际山茶杂志》上发表了学名 Camellia dilinhensis，越南语名称为 Tra di Linh，与首次发现该标本的 Di Linh 县同名。

小乔木，高3-4米；幼枝无毛。叶有柄，叶柄长1.4-1.9厘米；叶片长圆状椭圆形或椭圆形，长16.0-24.5厘米，宽5.5-9.5厘米，上面深绿色，下面淡绿色；中裂上面凹陷，下面突出，两面无毛：基部楔形，先端渐尖，叶缘有浅锯齿；侧脉8-14对。花淡黄色，直径 3.5-3.7 厘米，腋生，每组 1-3 朵；花梗长 5-7 毫米，有两三个小苞片，无毛。萼片 5，鳞片状近圆形，高 4-8 毫米，宽 8-11 毫米，无毛。花瓣 8 -9，近圆形或椭圆形，宽 1.2 -1.4 厘米，高 1.5-1.7 厘米，无毛。雄蕊群超过 350 个，长 5-9 毫米，无毛，外花丝从基部合生，形成一个短杯状，与花瓣在基部合生 2-2.5 毫米。雌蕊群3，子房圆筒状，被短柔毛，宽3-4毫米，高7-8毫米，3室；花柱3，离生至基部，长5毫米，被短柔毛。果实倒卵球形，未成熟果有白色有毛的疤痕；成熟果无毛，宽3.5-4厘米，高5.5-6.5厘米，3室，每室5-6粒种子。种子楔形，高 7-10 毫米，宽 8-11 毫米，短柔毛。

花期：冬季 本种采集于海拔 850-900 米的 林东省Dilinh 县的常绿林中。

越南林同省夷灵县