喷雪花Spiraea thunbergii
中文名（Chinese Name）：喷雪花
学名（Scientific Name）：Spiraea thunbergii Siebold ex Blume
英文名（English Common Name）：Thunberg's meadowsweet
别名（Chinese Common Name）：珍珠绣线菊、雪柳
异名（Synonym）：Awayus japonicus (Raf.) Raf. ex B.D.Jacks.
科属（Family & Genus）：蔷薇科（Rosaceae）绣线菊属
形态特征（Description）：灌木，高达1.5米；枝条细长开张，呈弧形弯曲，小枝有稜角，幼时被短柔毛，褐色，老时转红褐色，无毛；冬芽甚小，卵形，无毛或微被毛，有数枚鳞片。叶片线状披针形，长25-40毫米，宽3-7毫米，先端长渐尖。基部狭楔形，边缘自中部以上有尖锐锯齿，两面无毛，具羽状脉；叶柄极短或近无柄，长1-2毫米，有短柔毛。伞形花序无总梗，具花3-7朵，基部簇生数枚小形叶片；花梗细，长6-10毫米，无毛；花直径6-8毫米；萼筒钟状，外面无毛，内面微被短柔毛；萼片三角形或卵状三角形，先端尖，内面有稀疏短柔毛；花瓣倒卵形或近圆形，先端微凹至圆钝，长2-4毫米，宽2-3.5毫米，白色；雄蕊18-20，长约花1/3或更短；花盘圆环形，由10个裂片组成；子房无毛或微被短柔毛，花柱几与雄蕊等长。蓇葖果开张，无毛，花柱近顶生，稍斜展，具直立或反折萼片。花期4-5月，果期7月。
分布（Distribution）：原产华东，现山东、陕西、辽宁等地均有栽培，供观赏用。日本也有分布。
用途（Use）：花期很早，花朵密集如积雪，叶片薄细如鸟羽，秋季转变为桔红色，甚为美丽。
引自中国植物志英文版：FOC Vol. 9 Page 70
Spiraea thunbergii Siebold ex Blume, Bijdr. Fl. Ned. Ind. 17: 1115. 1826.
珍珠绣线菊 zhen zhu xiu xian ju| Rosaceae | Spiraea
Shrubs to 1.5 m. Branches spreading, arching, slender; branchlets brown to red-brown, angled, pubescent at fist, finally glabrous; buds ovoid, very small, with several scales, glabrous or puberulous. Petiole 1–2 mm, pubescent; leaf blade linear-lanceolate, 25–40 × 3–7 mm, glabrous on both surfaces, pinnately veined, base narrowly cuneate, margin sharply serrate above middle, apex long acuminate. Umbels sessile, with clustered leaves at base, 10–18 mm, 3–7-flowered; pedicels slender, 6–10 mm, glabrous. Flowers 6–8 mm in diam. Hypanthium campanulate, glabrous abaxially. Sepals triangular or ovate-triangular, 1.5–2 × 1–1.5 mm, erect or reflexed in fruit, apex acute. Petals white, obovate to suborbicular, 2–4 × 2–3.5 mm, glabrous, base shortly clawed, apex emarginate or obtuse. Stamens 18–20, to 1/3 as long as petals. Disk annular, 10-lobed. Carpels glabrous or puberulous; styles nearly equaling stamens. Follicles spreading, glabrous; styles subterminal, divergent. Fl. Apr–May, fr. Jul–Aug.
Native in E China; cultivated for ornament in Fujian, Jiangsu, Liaoning, Shaanxi, Shandong, Zhejiang, and other provinces [Japan].
（责任编辑：徐晔春）
学名（Scientific Name）：Spiraea thunbergii Siebold ex Blume
英文名（English Common Name）：Thunberg's meadowsweet
别名（Chinese Common Name）：珍珠绣线菊、雪柳
异名（Synonym）：Awayus japonicus (Raf.) Raf. ex B.D.Jacks.
科属（Family & Genus）：蔷薇科（Rosaceae）绣线菊属
形态特征（Description）：灌木，高达1.5米；枝条细长开张，呈弧形弯曲，小枝有稜角，幼时被短柔毛，褐色，老时转红褐色，无毛；冬芽甚小，卵形，无毛或微被毛，有数枚鳞片。叶片线状披针形，长25-40毫米，宽3-7毫米，先端长渐尖。基部狭楔形，边缘自中部以上有尖锐锯齿，两面无毛，具羽状脉；叶柄极短或近无柄，长1-2毫米，有短柔毛。伞形花序无总梗，具花3-7朵，基部簇生数枚小形叶片；花梗细，长6-10毫米，无毛；花直径6-8毫米；萼筒钟状，外面无毛，内面微被短柔毛；萼片三角形或卵状三角形，先端尖，内面有稀疏短柔毛；花瓣倒卵形或近圆形，先端微凹至圆钝，长2-4毫米，宽2-3.5毫米，白色；雄蕊18-20，长约花1/3或更短；花盘圆环形，由10个裂片组成；子房无毛或微被短柔毛，花柱几与雄蕊等长。蓇葖果开张，无毛，花柱近顶生，稍斜展，具直立或反折萼片。花期4-5月，果期7月。
分布（Distribution）：原产华东，现山东、陕西、辽宁等地均有栽培，供观赏用。日本也有分布。
用途（Use）：花期很早，花朵密集如积雪，叶片薄细如鸟羽，秋季转变为桔红色，甚为美丽。
引自中国植物志英文版：FOC Vol. 9 Page 70
Spiraea thunbergii Siebold ex Blume, Bijdr. Fl. Ned. Ind. 17: 1115. 1826.
珍珠绣线菊 zhen zhu xiu xian ju| Rosaceae | Spiraea
Shrubs to 1.5 m. Branches spreading, arching, slender; branchlets brown to red-brown, angled, pubescent at fist, finally glabrous; buds ovoid, very small, with several scales, glabrous or puberulous. Petiole 1–2 mm, pubescent; leaf blade linear-lanceolate, 25–40 × 3–7 mm, glabrous on both surfaces, pinnately veined, base narrowly cuneate, margin sharply serrate above middle, apex long acuminate. Umbels sessile, with clustered leaves at base, 10–18 mm, 3–7-flowered; pedicels slender, 6–10 mm, glabrous. Flowers 6–8 mm in diam. Hypanthium campanulate, glabrous abaxially. Sepals triangular or ovate-triangular, 1.5–2 × 1–1.5 mm, erect or reflexed in fruit, apex acute. Petals white, obovate to suborbicular, 2–4 × 2–3.5 mm, glabrous, base shortly clawed, apex emarginate or obtuse. Stamens 18–20, to 1/3 as long as petals. Disk annular, 10-lobed. Carpels glabrous or puberulous; styles nearly equaling stamens. Follicles spreading, glabrous; styles subterminal, divergent. Fl. Apr–May, fr. Jul–Aug.
Native in E China; cultivated for ornament in Fujian, Jiangsu, Liaoning, Shaanxi, Shandong, Zhejiang, and other provinces [Japan].
（责任编辑：徐晔春）
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