白花杜鹃Rhododendron mucronatum
中文名（Chinese Name）：白花杜鹃
学名（Scientific Name）：Rhododendron mucronatum (Bl.) G. Don
英文名（English Common Name）：
别名（Chinese Common Name）：尖叶杜鹃、白杜鹃
异名（Synonym）：Azalea rosmarinifolia Burm. f. Azalea mucronata Blume Azalea indica var. alba Lindl. Rhododendron ledifolium G. Don Rhododendron argyi H. Lév. Rhododendron rosmarinifolium (Burm. f.) Dippel
科属（Family & Genus）：杜鹃花科（Ericaceae）杜鹃属
形态特征（Description）：半常绿灌木，高1-2（-3）米；幼枝开展，分枝多，密被灰褐色开展的长柔毛，混生少数腺毛。叶纸质，披针形至卵状披针形或长圆状披针形，长2-6厘米，宽0.5-1.8厘米，先端钝尖至圆形，基部楔形，上面深绿色，疏被灰褐色贴生长糙伏毛，混生短腺毛，中脉、侧脉及细脉在上面凹陷，在下面凸出或明显可见；叶柄长2-4毫米，密被灰褐色扁平长糙伏毛和短腺毛。伞形花序顶生，具花1-3朵；花梗长达1.5厘米，密被淡黄褐色长柔毛和腺头毛；花萼大，绿色，裂片5，披针形，长1.2厘米，密被腺状短柔毛；花冠白色，有时淡红色，阔漏斗形，长3-4.5厘米，5深裂，裂片椭圆状卵形，长约与花冠管等长，无毛，也无紫斑；雄蕊10，不等长，花丝中部以下被微柔毛；子房卵球形，5室，长4毫米，直径2毫米，密被刚毛状糙伏毛和腺头毛，花柱伸出花冠外很长，无毛。蒴果圆锥状卵球形，长约1厘米。花期4-5月，果期6-7月。
分布（Distribution）：产江苏、浙江、江西、福建、广东、广西、四川和云南。
用途（Use）：
引自中国植物志英文版FOC Vol. 14 Page 441
Rhododendron mucronatum (Blume) G. Don, Gen. Hist. 3: 846. 1834.
白花杜鹃 bai hua du juan | Apiaceae | Rhododendron
Azalea mucronata Blume, Catalogus, 44. 1823; A. indica Linnaeus var. alba Lindley; A. rosmarinifolia N. L. Burman; Rhododendron argyi H. Léveillé; R. ledifolium G. Don; R. rosmarinifolium (N. L. Burman) Dippel (1889), not Vidal (1886).
Shrubs, semievergreen, 1–2(–3) m tall; young shoots spreading; branches many, densely gray-brown villous, also with a few glandular hairs. Summer and winter leaves different. Petiole 2–4 mm, densely long-strigose, hairs flat, and shortly glandular-hairy; leaf blade papery, lanceolate to ovate-lanceolate or oblong-lanceolate, 2–6 × 0.5–1.8 cm; base cuneate; apex obtuse to rounded. Inflorescence 1–3-flowered. Pedicel to 1.5 cm, densely yellowish brown-villous, also glandular-hairy; calyx lobes 5, lanceolate, ca. 12 mm, densely glandular-pubescent; corolla broadly funnelform, deeply 5-lobed, white, occasionally pale red, without purple flecks, 3–4.5 cm, lobes elliptic-ovate, as long as tube, glabrous; stamens 10, unequal, filaments puberulent below; ovary ovoid, ca. 4 × 2 mm, 5-locular, densely coarsely appressed-glandular-setose; style very long-exserted, glabrous. Capsule conical ovoid, ca. 10 mm. Fl. Apr–May, fr. Jun–Jul.
Cultivated in many places in E and S Sichuan and in many parks in China. Fujian, Guangdong, Guangxi, Jiangsu, Jiangxi, Sichuan, Yunnan, Zhejiang [of cultivated origin].
This species was described from a cultivated plant that may represent an albino form of the Japanese Rhododendron mucronatum var. ripense (Makino) E. H. Wilson; the latter differs in having rose-pink flowers.
（责任编辑：徐晔春）
学名（Scientific Name）：Rhododendron mucronatum (Bl.) G. Don
英文名（English Common Name）：
别名（Chinese Common Name）：尖叶杜鹃、白杜鹃
异名（Synonym）：Azalea rosmarinifolia Burm. f. Azalea mucronata Blume Azalea indica var. alba Lindl. Rhododendron ledifolium G. Don Rhododendron argyi H. Lév. Rhododendron rosmarinifolium (Burm. f.) Dippel
科属（Family & Genus）：杜鹃花科（Ericaceae）杜鹃属
形态特征（Description）：半常绿灌木，高1-2（-3）米；幼枝开展，分枝多，密被灰褐色开展的长柔毛，混生少数腺毛。叶纸质，披针形至卵状披针形或长圆状披针形，长2-6厘米，宽0.5-1.8厘米，先端钝尖至圆形，基部楔形，上面深绿色，疏被灰褐色贴生长糙伏毛，混生短腺毛，中脉、侧脉及细脉在上面凹陷，在下面凸出或明显可见；叶柄长2-4毫米，密被灰褐色扁平长糙伏毛和短腺毛。伞形花序顶生，具花1-3朵；花梗长达1.5厘米，密被淡黄褐色长柔毛和腺头毛；花萼大，绿色，裂片5，披针形，长1.2厘米，密被腺状短柔毛；花冠白色，有时淡红色，阔漏斗形，长3-4.5厘米，5深裂，裂片椭圆状卵形，长约与花冠管等长，无毛，也无紫斑；雄蕊10，不等长，花丝中部以下被微柔毛；子房卵球形，5室，长4毫米，直径2毫米，密被刚毛状糙伏毛和腺头毛，花柱伸出花冠外很长，无毛。蒴果圆锥状卵球形，长约1厘米。花期4-5月，果期6-7月。
分布（Distribution）：产江苏、浙江、江西、福建、广东、广西、四川和云南。
用途（Use）：
引自中国植物志英文版FOC Vol. 14 Page 441
Rhododendron mucronatum (Blume) G. Don, Gen. Hist. 3: 846. 1834.
白花杜鹃 bai hua du juan | Apiaceae | Rhododendron
Azalea mucronata Blume, Catalogus, 44. 1823; A. indica Linnaeus var. alba Lindley; A. rosmarinifolia N. L. Burman; Rhododendron argyi H. Léveillé; R. ledifolium G. Don; R. rosmarinifolium (N. L. Burman) Dippel (1889), not Vidal (1886).
Shrubs, semievergreen, 1–2(–3) m tall; young shoots spreading; branches many, densely gray-brown villous, also with a few glandular hairs. Summer and winter leaves different. Petiole 2–4 mm, densely long-strigose, hairs flat, and shortly glandular-hairy; leaf blade papery, lanceolate to ovate-lanceolate or oblong-lanceolate, 2–6 × 0.5–1.8 cm; base cuneate; apex obtuse to rounded. Inflorescence 1–3-flowered. Pedicel to 1.5 cm, densely yellowish brown-villous, also glandular-hairy; calyx lobes 5, lanceolate, ca. 12 mm, densely glandular-pubescent; corolla broadly funnelform, deeply 5-lobed, white, occasionally pale red, without purple flecks, 3–4.5 cm, lobes elliptic-ovate, as long as tube, glabrous; stamens 10, unequal, filaments puberulent below; ovary ovoid, ca. 4 × 2 mm, 5-locular, densely coarsely appressed-glandular-setose; style very long-exserted, glabrous. Capsule conical ovoid, ca. 10 mm. Fl. Apr–May, fr. Jun–Jul.
Cultivated in many places in E and S Sichuan and in many parks in China. Fujian, Guangdong, Guangxi, Jiangsu, Jiangxi, Sichuan, Yunnan, Zhejiang [of cultivated origin].
This species was described from a cultivated plant that may represent an albino form of the Japanese Rhododendron mucronatum var. ripense (Makino) E. H. Wilson; the latter differs in having rose-pink flowers.
（责任编辑：徐晔春）
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