杜茎山 Maesa japonica
中文名（Chinese Name）：杜茎山
学名（Scientific Name）：Maesa japonica (Thunb.) Zipp. ex Scheff.
英文名（English Common Name）：
别名（Chinese Common Name）：白花茶
异名（Synonym）：Maesa Sect. Doraena (Thunb.) Nakai Doraena japonica Thunb. Maesa taiheizanensis Sasaki Maesa taiheizensis Sasaki Maesa japonica f. gracilis Nakai Maesa esquirolii H. Lév. Maesa dunniana H. Lév. Myrsine esquirolii H. Lév. Maesa randaiensis Hayata Maesa coriacea Champion ex Bentham Maesa coriacea var. gracilis Benth. Maesa labordei H. Lév. Maesa cavaleriei H. Lév. Pieris oligodonta H. Lév. Maesa doraena Blume ex Siebold et Zucc. Maesa gracilis Benth.
科属（Family & Genus）：紫金牛科（Myrsinaceae）杜茎山属
形态特征（Description）：灌木，直立，有时外倾或攀援，高1-3 (-5) 米；小枝无毛，具细条纹，疏生皮孔。叶片革质，有时较薄，椭圆形至披针状椭圆形，或倒卵形至长圆状倒卵形，或披针形，顶端渐尖、急尖或钝，有时尾状渐尖，基部楔形、钝或圆形，一般长约10厘米，宽约3厘米，也有长5-15厘米，宽2-5厘米，几全缘或中部以上具疏锯齿，或除基部外均具疏细齿，两面无毛，叶面中、侧脉及细脉微隆起，背面中脉明显，隆起，侧脉5-8对，不甚明显，尾端直达齿尖；叶柄长5-13毫米，无毛。总状花序或圆锥花序，单1或2-3个腋生，长1-3 (-4) 厘米，仅近基部具少数分枝，无毛；苞片卵形，长不到1毫米；花梗长2-3毫米，无毛或被极疏的微柔毛；小苞片广卵形或肾形，紧贴花萼基部，无毛，具疏细缘毛或腺点；花萼长约2毫米，萼片长约1毫米，卵形至近半圆形，顶端钝或圆形，具明显的脉状腺条纹，无毛，具细缘毛；花冠白色，长钟形，管长3.5-4毫米，具明显的脉状腺条纹，裂片长为管的1/3或更短，卵形或肾形，顶端钝或圆形，边缘略具细齿；雄蕊着生于花冠管中部略上，内藏；花丝与花药等长，花药卵形，背部具腺点；柱头分裂。果球形，直径4-5毫米，有时达6毫米，肉质，具脉状腺条纹，宿存萼包果顶端，常冠宿存花柱。花期1-3月，果期10月或5月。
分布（Distribution）：产我国西南至台湾以南各省区，海拔300-2000米的山坡或石灰山杂木林下阳处，或路旁灌木丛中。日本及越南北部也有。
用途（Use）：果可食，微甜；全株供药用，有祛风寒、消肿之功，用于治腰痛、头痛、心燥烦渴、眼目晕眩等症；根与白糖煎服治皮肤风毒，亦治妇女崩带；茎、叶外敷治跌打损伤，止血。
引自中国植物志英文版：FOC Vol. 15 Page 7
Maesa japonica (Thunberg) Moritzi & Zollinger, Syst. Verz. Ind. Archip. 3: 61. 1855.
杜茎山 du jing shan| Myrsinaceae | Maesa
Doraena japonica Thunberg, Nov. Gen. Pl. 3: 59. 1783; Baeobotrys japonica (Thunberg) Zippelius ex Scheffer; Maesa cavaleriei H. Léveillé; M. coriacea Champion; M. coriacea var. gracilis Bentham; M. doraena Blume ex Siebold & Zuccarini; M. dunniana H. Léveillé; M. esquirolii H. Léveillé; M. japonica f. gracilis (Bentham) Nakai; M. labordei H. Léveillé; M. randaiensis Hayata; M. taiheizanensis Sasaki; Myrsine esquirolii H. Léveillé; Pieris oligodonta H. Léveillé.
Shrubs erect, sometimes decumbent or scandent, 1-3(-5) m tall. Branchlets terete, apex glandular granulose, early glabrescent; pith solid. Petiole canaliculate, 5-13 mm; leaf blade elliptic, lanceolate, to obovate, 5-16 × 2-5 cm, leathery, inconspicuously pellucid punctate, base cuneate or obtuse to rounded, smooth adaxially, margin entire toward base and subentire to serrate distally with mucronate teeth, apex acuminate to acute or obtuse; lateral veins 5-8 on each side of midrib. Inflorescences axillary, racemose or paniculate, 1-3(-4) cm, glabrous; bracteoles broadly ovate or reniform, to 1 mm, dark punctate-lineate, ciliate, encircling pedicel. Flowers white, 3.5-5 mm. Pedicel 2.5-3.5 mm, glandular granulose, glabrescent. Calyx ca. 2 mm; lobes ca. 1 mm, ovate to orbicular, punctate-lineate, margin entire, ciliate, apex obtuse or rounded. Corolla white, tubular-campanulate; tube 3-4 mm, prominently punctate-lineate; lobes reniform or ovate, ca. 1 mm, apex rounded or obtuse. Stamens included; anthers ovate, as long as filaments, glandular on back. Pistil included. Style slender, persistent, conical at base in fruit; stigma lobed. Fruit globose or ovoid, 4-5(-6) mm in diam., fleshy, punctate-lineate. Fl. Jan-Mar, fr. Oct-May.
Mixed forests, hillsides, limestone mountains; 300-2000 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Sichuan, Taiwan, Yunnan, Zhejiang [Japan, N Vietnam]
（责任编辑：徐晔春）
学名（Scientific Name）：Maesa japonica (Thunb.) Zipp. ex Scheff.
英文名（English Common Name）：
别名（Chinese Common Name）：白花茶
异名（Synonym）：Maesa Sect. Doraena (Thunb.) Nakai Doraena japonica Thunb. Maesa taiheizanensis Sasaki Maesa taiheizensis Sasaki Maesa japonica f. gracilis Nakai Maesa esquirolii H. Lév. Maesa dunniana H. Lév. Myrsine esquirolii H. Lév. Maesa randaiensis Hayata Maesa coriacea Champion ex Bentham Maesa coriacea var. gracilis Benth. Maesa labordei H. Lév. Maesa cavaleriei H. Lév. Pieris oligodonta H. Lév. Maesa doraena Blume ex Siebold et Zucc. Maesa gracilis Benth.
科属（Family & Genus）：紫金牛科（Myrsinaceae）杜茎山属
形态特征（Description）：灌木，直立，有时外倾或攀援，高1-3 (-5) 米；小枝无毛，具细条纹，疏生皮孔。叶片革质，有时较薄，椭圆形至披针状椭圆形，或倒卵形至长圆状倒卵形，或披针形，顶端渐尖、急尖或钝，有时尾状渐尖，基部楔形、钝或圆形，一般长约10厘米，宽约3厘米，也有长5-15厘米，宽2-5厘米，几全缘或中部以上具疏锯齿，或除基部外均具疏细齿，两面无毛，叶面中、侧脉及细脉微隆起，背面中脉明显，隆起，侧脉5-8对，不甚明显，尾端直达齿尖；叶柄长5-13毫米，无毛。总状花序或圆锥花序，单1或2-3个腋生，长1-3 (-4) 厘米，仅近基部具少数分枝，无毛；苞片卵形，长不到1毫米；花梗长2-3毫米，无毛或被极疏的微柔毛；小苞片广卵形或肾形，紧贴花萼基部，无毛，具疏细缘毛或腺点；花萼长约2毫米，萼片长约1毫米，卵形至近半圆形，顶端钝或圆形，具明显的脉状腺条纹，无毛，具细缘毛；花冠白色，长钟形，管长3.5-4毫米，具明显的脉状腺条纹，裂片长为管的1/3或更短，卵形或肾形，顶端钝或圆形，边缘略具细齿；雄蕊着生于花冠管中部略上，内藏；花丝与花药等长，花药卵形，背部具腺点；柱头分裂。果球形，直径4-5毫米，有时达6毫米，肉质，具脉状腺条纹，宿存萼包果顶端，常冠宿存花柱。花期1-3月，果期10月或5月。
分布（Distribution）：产我国西南至台湾以南各省区，海拔300-2000米的山坡或石灰山杂木林下阳处，或路旁灌木丛中。日本及越南北部也有。
用途（Use）：果可食，微甜；全株供药用，有祛风寒、消肿之功，用于治腰痛、头痛、心燥烦渴、眼目晕眩等症；根与白糖煎服治皮肤风毒，亦治妇女崩带；茎、叶外敷治跌打损伤，止血。
引自中国植物志英文版：FOC Vol. 15 Page 7
Maesa japonica (Thunberg) Moritzi & Zollinger, Syst. Verz. Ind. Archip. 3: 61. 1855.
杜茎山 du jing shan| Myrsinaceae | Maesa
Doraena japonica Thunberg, Nov. Gen. Pl. 3: 59. 1783; Baeobotrys japonica (Thunberg) Zippelius ex Scheffer; Maesa cavaleriei H. Léveillé; M. coriacea Champion; M. coriacea var. gracilis Bentham; M. doraena Blume ex Siebold & Zuccarini; M. dunniana H. Léveillé; M. esquirolii H. Léveillé; M. japonica f. gracilis (Bentham) Nakai; M. labordei H. Léveillé; M. randaiensis Hayata; M. taiheizanensis Sasaki; Myrsine esquirolii H. Léveillé; Pieris oligodonta H. Léveillé.
Shrubs erect, sometimes decumbent or scandent, 1-3(-5) m tall. Branchlets terete, apex glandular granulose, early glabrescent; pith solid. Petiole canaliculate, 5-13 mm; leaf blade elliptic, lanceolate, to obovate, 5-16 × 2-5 cm, leathery, inconspicuously pellucid punctate, base cuneate or obtuse to rounded, smooth adaxially, margin entire toward base and subentire to serrate distally with mucronate teeth, apex acuminate to acute or obtuse; lateral veins 5-8 on each side of midrib. Inflorescences axillary, racemose or paniculate, 1-3(-4) cm, glabrous; bracteoles broadly ovate or reniform, to 1 mm, dark punctate-lineate, ciliate, encircling pedicel. Flowers white, 3.5-5 mm. Pedicel 2.5-3.5 mm, glandular granulose, glabrescent. Calyx ca. 2 mm; lobes ca. 1 mm, ovate to orbicular, punctate-lineate, margin entire, ciliate, apex obtuse or rounded. Corolla white, tubular-campanulate; tube 3-4 mm, prominently punctate-lineate; lobes reniform or ovate, ca. 1 mm, apex rounded or obtuse. Stamens included; anthers ovate, as long as filaments, glandular on back. Pistil included. Style slender, persistent, conical at base in fruit; stigma lobed. Fruit globose or ovoid, 4-5(-6) mm in diam., fleshy, punctate-lineate. Fl. Jan-Mar, fr. Oct-May.
Mixed forests, hillsides, limestone mountains; 300-2000 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Sichuan, Taiwan, Yunnan, Zhejiang [Japan, N Vietnam]
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