菱形叶杜鹃Rhododendron rhombifolium
中文名（Chinese Name）：菱形叶杜鹃
学名（Scientific Name）：Rhododendron rhombifolium R. C. Fang
英文名（English Common Name）：
别名（Chinese Common Name）：
异名（Synonym）：
科属（Family & Genus）：杜鹃花科（Ericaceae） 杜鹃属
形态特征（Description）： 灌木，通常附生，高2-3米。幼枝密被褐色鳞片，老枝灰色。叶聚生枝顶，菱状椭圆形或菱状披针形，长5-8.5厘米，宽2-3厘米，顶端渐尖，基部楔形，幼叶边缘疏生褐色长刚毛，上面洁净无鳞片，下面干后褐色，密被大鳞片，鳞片褐红色，有宽边缘，不等大，相距小于直径，中脉在叶面凹陷，在下面凸起，侧脉纤细，在两面均不显，网脉在叶面明显；叶柄短，长0.5-1.2厘米，密被褐色鳞片，初时两侧生褐色长刚毛，以后脱落。花末见。果序有果3-4个，伞形着生；果梗粗壮，长0.6-1厘米，密被褐色鳞片；蒴果卵珠状或长圆形，密被褐色鳞片，6瓣开裂；宿存萼片长2毫米，波状，边缘密生褐色刚毛，宿存花柱下部1/3被鳞片
分布（Distribution）：产云南贡山。生于山坡阔叶林中或附生于密林中树上，海拔1 800-1 900米。
用途（Use）：
引自中国植物志英文版FOC Vol. 14 Page 270
Rhododendron rhombifolium R. C. Fang, Acta Bot. Yunnan. 4: 251. 1982.
菱形叶杜鹃 ling xing ye du juan | Apiaceae | Rhododendron
Shrubs, often epiphytic, 2–3 m tall; old branches gray; young shoots densely brown-scaly. Petiole short, 5–12 mm, densely brown-scaly; hispid on both surfaces when young, glabrescent; leaf blade rhomboidal or rhomboidal-lanceolate, 5–8.5 × 2–3 cm; base cuneate; apex acuminate; abaxial surface brown when dry, scales less than 1 × their own diameter apart, large, unequal, brownish red; adaxial surface glabrous; midrib raised abaxially, concave adaxially; lateral veins thin, inconspicuous on both surfaces. Flowers not seen, infructescence umbellate, 3- or 4-fruited. Pedicel stout, 0.6–1 cm, densely brown-scaly; fruiting calyx margin wavy, ciliate, ca. 2 mm, persistent; style persistent, basal 1/3 with scales. Capsule cylindric or ovoid-cylindric, 6-lobed, 12–20 × 8–12 mm, densely brown-scaly.
Broad-leaved forests, sometimes epiphytic on trees in dense forests; 1800–1900 m. Yunnan.
The leaf shape of Rhododendron rhombifolium is close to that of the sympatric R. taronense, but the clearly ciliate calyx of the former distinguishes the two species. Flowering material is required before the true affinities of R. rhombifolium can be ascertained, as the type specimen is in fruit. The label on the isotype at E (“Salwin-Kiukiang Divide, Muchielung, 1800 m, 8 Oct. 1938, T. T. Yü 20581”) is somewhat at variance with the citation in the protologue (“Gongshan, ad truncos in sylvis densis, alt. 1800 m, 8 Oct. 1937, T. T. Yü 20581”).
（责任编辑：徐晔春）
学名（Scientific Name）：Rhododendron rhombifolium R. C. Fang
英文名（English Common Name）：
别名（Chinese Common Name）：
异名（Synonym）：
科属（Family & Genus）：杜鹃花科（Ericaceae） 杜鹃属
形态特征（Description）： 灌木，通常附生，高2-3米。幼枝密被褐色鳞片，老枝灰色。叶聚生枝顶，菱状椭圆形或菱状披针形，长5-8.5厘米，宽2-3厘米，顶端渐尖，基部楔形，幼叶边缘疏生褐色长刚毛，上面洁净无鳞片，下面干后褐色，密被大鳞片，鳞片褐红色，有宽边缘，不等大，相距小于直径，中脉在叶面凹陷，在下面凸起，侧脉纤细，在两面均不显，网脉在叶面明显；叶柄短，长0.5-1.2厘米，密被褐色鳞片，初时两侧生褐色长刚毛，以后脱落。花末见。果序有果3-4个，伞形着生；果梗粗壮，长0.6-1厘米，密被褐色鳞片；蒴果卵珠状或长圆形，密被褐色鳞片，6瓣开裂；宿存萼片长2毫米，波状，边缘密生褐色刚毛，宿存花柱下部1/3被鳞片
分布（Distribution）：产云南贡山。生于山坡阔叶林中或附生于密林中树上，海拔1 800-1 900米。
用途（Use）：
引自中国植物志英文版FOC Vol. 14 Page 270
Rhododendron rhombifolium R. C. Fang, Acta Bot. Yunnan. 4: 251. 1982.
菱形叶杜鹃 ling xing ye du juan | Apiaceae | Rhododendron
Shrubs, often epiphytic, 2–3 m tall; old branches gray; young shoots densely brown-scaly. Petiole short, 5–12 mm, densely brown-scaly; hispid on both surfaces when young, glabrescent; leaf blade rhomboidal or rhomboidal-lanceolate, 5–8.5 × 2–3 cm; base cuneate; apex acuminate; abaxial surface brown when dry, scales less than 1 × their own diameter apart, large, unequal, brownish red; adaxial surface glabrous; midrib raised abaxially, concave adaxially; lateral veins thin, inconspicuous on both surfaces. Flowers not seen, infructescence umbellate, 3- or 4-fruited. Pedicel stout, 0.6–1 cm, densely brown-scaly; fruiting calyx margin wavy, ciliate, ca. 2 mm, persistent; style persistent, basal 1/3 with scales. Capsule cylindric or ovoid-cylindric, 6-lobed, 12–20 × 8–12 mm, densely brown-scaly.
Broad-leaved forests, sometimes epiphytic on trees in dense forests; 1800–1900 m. Yunnan.
The leaf shape of Rhododendron rhombifolium is close to that of the sympatric R. taronense, but the clearly ciliate calyx of the former distinguishes the two species. Flowering material is required before the true affinities of R. rhombifolium can be ascertained, as the type specimen is in fruit. The label on the isotype at E (“Salwin-Kiukiang Divide, Muchielung, 1800 m, 8 Oct. 1938, T. T. Yü 20581”) is somewhat at variance with the citation in the protologue (“Gongshan, ad truncos in sylvis densis, alt. 1800 m, 8 Oct. 1937, T. T. Yü 20581”).
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