露珠杜鹃Rhododendron irroratum

中文名(Chinese Name):露珠杜鹃
学名(Scientific Name):Rhododendron irroratum Franch.
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Rhododendron ninguenense Hand.-Mazz.  Rhododendron ningyuenense Hand.-Mazz.  Rhododendron maximowiczianum H. Lév. 
科属(Family & Genus):杜鹃花科(Ericaceae)杜鹃属
形态特征(Description):灌木或小乔木,高约2-9米;小枝粗壮,直径约4-5毫米;幼枝有薄层绒毛和腺体,以后逐渐脱落;老枝光滑。叶多密生于枝顶,革质,椭圆形、披针形或长圆状椭圆形,长7-14厘米,宽2-4厘米,先端渐尖,基部圆形或宽楔形,边缘全缘或成波状皱缩,中脉在上面下凹陷,在下面显著隆起,侧脉17-20对,在两面均微现;叶柄圆柱状,长1-2厘米,上面平坦,有沟纹,无毛。总状伞形花序,有7-15花,总轴长2-4厘米,疏生柔毛和淡红色腺体;花梗粗壮,长1-2厘米,密被腺体;花萼小,盘状,5浅裂,裂片长1-2毫米,顶端钝圆,外面及边缘有腺体;花冠管状或钟状,长3-4厘米,淡黄色、白色或粉红色,有黄绿色至淡紫红色斑点,5裂,裂片半圆形,长1.5厘米,宽约2厘米,顶端有凹缺。雄蕊10,长2-3.5厘米,不等长,花丝基部线形,被开展的柔毛;子房圆锥状或窄卵圆形,长约6毫米,密被腺体,花柱长于花冠,长约3.5-4厘米,通体密生红色腺体,柱头不膨大。蒴果圆柱状,长1.5-2厘米,粗约7-9毫米,有腺体,成熟后开裂,8-10室。花期3-5月,果期9-10月。
分布(Distribution):产于四川、贵州及云南。生于海拔1700-3600米的山坡常绿阔叶林中或灌木丛中。
用途(Use):
引自中国植物志英文版FOC Vol. 14 Page 362
  Rhododendron irroratum Franchet, Bull. Soc. Bot. France. 34: 280. 1887.
露珠杜鹃 lu zhu du juan  | Apiaceae  | Rhododendron
Shrubs or small trees, 2–9 m tall; young shoots thinly tomentose and with glandular hairs that soon wither. Petiole cylindric, 10–20 mm, glabrescent; leaf blade leathery, oblanceolate to narrowly elliptic, 7–14 × 2–4 cm; base rounded or broadly cuneate; margin entire or undulate; apex acuminate; both surfaces glabrous when mature; midrib distinct and prominent abaxially, deeply grooved adaxially; lateral veins 17–20-paired, impressed. Inflorescence laxly racemose-umbellate, 7–15-flowered; rachis 20–40 mm, pubescent and rufous glandular-hairy. Pedicel stout, 1–2 cm, densely glandular-hairy, sometimes tomentose; calyx lobes 5, ca. 2 mm, rounded or broadly triangular, margin glandular; corolla tubular-campanulate, white or creamy yellow to violet-rose, with greenish or purple flecks, 3–4 cm, 5 nectar pouches at base; lobes 5, orbicular, 2–2.5 × ca. 3 cm, emarginate; stamens 10, unequal, 2–3.5 cm, filaments pubescent at base; ovary conoid, 5–6 mm, 8–10-loculed, densely glandular-hairy; style sometimes glandular to the tip, stigma small. Capsule oblong-cylindric, 15–20 × 6–10 mm. Fl. Mar–May, fr. Sep–Oct.
Evergreen broad-leaved forests, mixed forests; 1700–3500 m. W Guizhou, SW Sichuan, N and SE Yunnan [N Vietnam].
露珠杜鹃Rhododendron irroratum

露珠杜鹃Rhododendron irroratum

露珠杜鹃Rhododendron irroratum

露珠杜鹃Rhododendron irroratum(责任编辑:徐晔春)

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