Section：Archecamellia
Conservation Status：
Remarks：This name is accepted
References：
Thea amplexicaulis Pit. H.Lecomte (ed.), Fl. Indo-Chine 1: 343 (1910) Homotypic Synonym
Camellia amplexicaulis (Pit.) Cohen-Stuart Meded. Proefstat. Thee 11: 67 (1916) Accepted Name
Camellia amplexicaulis (Pit.) Cohen-Stuart Chang Hung-ta and Bruce Bartholomew (1984). Camellias, p.125 Cited Name
Camellia cylindracea T.L.Ming Acta Bot. Yunnan. 16: 343 (1994) Heterotypic Synonym
Camellia cylindracea T.L.Ming Ming, T.L. (2000) monograph of the genus Camellia. yunnan Science and Technology Press, Kunming, p.108-110 Cited Name
10 show +
» Description
Camellia amplexicaulis (Pit.) Cohen-Stuart (1916: 67) ≡ Thea amplexicaulis Pitard (1910: 343) Type (lectotype designated by Ming & Zhang 1993: 9):—VIETNAM. Hanoi, May 1886, Balansa 3858 (K!). = Camellia cylindracea Ming (2000: 108), syn. nov. Type:—VIETNAM. Phu Tho: Cau Hai, 23 January 1961, s.n. (holotype KUN No. 0054473, barcode 1205997!, Fig. 1-G, H and I, the image of the holotype is also available at http://kun.kingdonia.org/speciman/ show/id/734955)
Camellia amplexicaulis, Subgenus Thea, Sect. Longipedicellata, Chang Hung-ta and Bruce Bartholomew (1984). Camellias, p.125: Camellia amplexicaulis (Pitard) Cohen-Stuart, Meded. Proefst. Thee 40:67. 1916. [Description] Branchlets glabrous. Leaves elliptic, 15-16cm long, bases auriculate. Pedicels 12 mmlong, persistent; bracts 6-7; sepals 5, persistent; petals 8; filament to 23 length of stamens, puberulent; ovaries pubescent; styles 3-parted, free. [Distribution] northern Vietnam, in the region of the estuary of Yunnan River. [Synonym] Thea amplexicaulis Pitard in Lecomte, Fl. Gen. Indo-Chine 1: 343. 1910.
C. cylindracea were treated as heterotypic synonyms of C. amplexicaulis by Zhao (2019) https://www.mapress.com/j/pt/article/view/phytotaxa.419.1.7/34132. as follows:
Nomenclatural notes:—Pitard (1910: 344) cited “Balansa, Bon” in the protologue of T. amplexicaulis. Ming & Zhang (1993: 9) designated B. Balansa 3858 at K as the lectotype of T. amplexicaulis without citing any collection from P though seven syntypes of this species were conserved at P (Balansa 3858: one sheet without barcode or herbarium number, the other bearing barcode P04500319; Balansa 4826: P04500315 and P04500316; Bon 9113: P04500321, P04500322 and P04500324). A specimen (P04500319 of Balansa 3858, the image of the isolectotype is available at https://science.mnhn.fr/institution/mnhn/collection/p/item/p04500319), bearing a drawing of a dissected flower and Pitard’s manuscript note “Thea amplexicaulis sp. n.”, is found at P and this sheet could serve as the lectotype more appropriately. Unfortunately, the lectotypification of T. amplexicaulis made by Ming & Zhang (1993: 9) must be followed under Art. 9.19 of the ICN. A single specimen of Balansa 3858, consisting of leaf and flower fragments, was found at K, which acts as the lectotype of T. amplexicaulis.
Camellia cylindracea was not validly published by Ming (1994: 343) because the author failed to use “one of the words ‘typus’ or ‘holotypus’, or its abbreviation, or its equivalent in a modern language” to indicate the type (Art. 40.6 of the ICN). The species was, however, later validly published by the same author (Ming 2000: 108).
Morphological notes:—Ming (2000) suggested that C. cylindracea differed from other Camellia by its cylindrical ovary (7 mm long, ca. 3 mm in diam., translated from the original Chinese: “长7毫米，粗约3毫米”; Ming 2000: 110) and a fused style with five arms at apex (Fig. 1-G). Those character states were valued by Ming so much so that he established the monotypic sect. Cylindriea Ming (2000: 108) based on the species. One dissected flower is attached on the holotype of C. cylindracea at KUN (barcode 1205997). The length of its ovary is, however, ca. 4 mm—beneath the ovary, it is the attachment region for petals and filaments, which is ca. 3 mm long and its length cannot be counted to that of the ovary (Fig. 1-G). Moreover, another gynoecium of the holotype bears four distinct styles (Fig. 1-H and I), and the isotype, KUN 1206000 (its image is available at http://kun.kingdonia.org/speciman/show/id/734958), has a dissected flower bud that bears a fused style with three arms at apex. The fused style may be a morphological variation within the same individual or an artificial effect introduced by the specimen processing (Fig. 1-G).
The flower of C. amplexicaulis usually bears three styles (Ming 2000: 93). However, the number of styles in a flower of C. amplexicaulis can vary among different individuals. I found that there were flowers bearing two,three and four styles of this species (see Fig.1-D, E and F, respectively; Zhao 197 at TCD). By contrast, the flowers of C. cylindracea bear three, four or five styles according to its holotype (KUN 1205997; Fig. 1-G, H and I) and isotype (KUN 1206000), suggesting an unstable state of this character even within a single individual. Apart from the discussion above, it is difficult to find any other substantial morphological difference between C. cylindracea and C. amplexicaulis. Therefore, C. cylindracea is treated as a new heterotypic synonym of C. amplexicaulis.
Camellia amplexicaulis is endemic to Vietnam. It is widely planted as a horticultural shrub in the gardens of the North Vietnam, South and Southwest China.
» Distribution
» Description
越南抱茎茶Camellia amplexicaulis (Pitard) Cohen Stuart in Meded. Proefst. Thee, 40：67,1916,Sealy，Rev.Gen. Camellia，43.1958. 张宏达，1981. 《山茶属植物的系统研究》第99页。【标本】越南：Tien Son, T.V.Trong 3130.，分布：越南北部，靠近我囯云南河口一带。【形态特征】这个种具秃净的嫩枝，叶椭圆形，长15-16厘米，基部耳形，花梗长12毫米，宿存苞片6-7片；萼片5，宿存；花辧8；花丝管长为雄蕊2/3，有微毛；子房无毛，花柱3条，离生。
高继银、帕克斯、杜跃强，2005. 《山茶属植物主要原种彩色图集》浙江科学技术出版社，第23-24页。花紫红色，花径4.0~7.0厘米，单生或簇生于枝顶或叶腋。花柄粗壮，长10~12毫米，无毛。苞片宿存，6~7枚，无毛，萼片5枚，外面无毛，里面被褐色微毛。花瓣8~13枚，长2.5~4.0厘米，宽2.0~3.0厘米，肉质，阔卵圆形，先端圆，内凹，基部与雄蕊群贴生。雄蕊长3.0〜3.2厘米，外轮花丝连生2.2厘米，形成一个被柔毛的肉质管，离生部分无毛。雌蕊无毛，长约2.5厘米，花柱3条，基部离生，子房无毛。花期夏季至秋季，甚至全年。蒴果球形，具3个明显纵裂沟，3室，果皮厚约5笔术。叶椭圆形或长椭圆形，先端钝尖，基部耳状抱茎，长15.0~25.0厘米，宽6.0~11.0厘米，边缘具细齿，齿距1~2毫米，无毛，叶面叶脉略凹陷，叶背叶脉凸起。叶柄长3~5毫米。灌木，高可达3米，嫩枝无毛，紫褐色。分布： 越南北部与中国云南河口接壌的地区。 可寻地点:越南 Lang Son 省。在越南Tam Dao 山脚下的庙宇入口处有 100 多株 3 米高的越南抱茎茶小树。
» Distribution
Species in the Same Section: 大苞山茶 Camellia granthamiana Sealy、大白山茶 Camellia albogigas Hu、肋果山茶 Camellia pleurocarpa (Gagnep.) Sealy、麦安山茶 Camellia maianhii Curry, VD Luong & ND Do、大花萼山茶 Camellia megasepala Hung T.Chang & Trin Ninh、普候山茶 Camellia puhoatensis N.S.Lý, V.D.Luong, T.H.Lê, D.H.Nguyễn & N.D.Do、普康金花茶 Camellia pukhangensis N.D.Do, V.D.Luong, S.T.Hoang & T.H.Lê、文朗山茶 Camellia vanlangensis V.D.Luong & V.T.Pham、白抱茎山茶 Camellia lucii Orel & Curry、肖抱茎山茶 Camellia ingens Orel & Curry、拟抱茎山茶 Camellia scabrosa Orel & Curry、梨果抱茎山茶 Camellia pyriparva Orel & Curry
