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两色杜鹃 liangsedujuan

被子植物门 Angiospermae
双子叶植物纲 Dicotyledoneae
合瓣花亚纲 Sympetalae
杜鹃花目 Ericales
杜鹃花科 Ericaceae
杜鹃属 Rhododendron
相关名称 Common Names
拉丁名
Rhododendron dichroanthum Diels
中文名
两色杜鹃
拼音
liangsedujuan
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描述 Description
常绿灌木,高1-2米,一年生枝近无毛,当年生幼枝有白而薄的蛛丝状毛。叫坚纸质,矩圆状倒披针形,长6-8厘米,上部1/3处宽2-3厘米,向下渐狭,顶端圆,有短凸尖头,上面无毛,网脉凹入,下面有白粉状毛被,中脉隆起,无毛;叶柄长约1厘米,近无毛,上面有纵沟。顶生短总状花序呈伞形,疏生花5-7朵,总轴长约5毫米,无毛;花梗长1.5厘米,有卷曲毛,最后弯向下;花萼大,红色,多变,长达1.2厘米,杯状,4-5浅裂,裂片顶端圆,无毛,有时有极短的疏细睫毛;花冠橙紫色,宽筒状钟形,5裂,筒部长3-3.5厘米,无毛,裂片5,略开展,有缺刻;雄蕊10,花丝向基部有疏微毛;子房6室,有毛,花柱无毛。 产云南西北部。生海拔3000米的草原。
中国高等植物图鉴

224. 两色杜鹃(中国高等植物图鉴)

Rhododendron dichroanthum Diels in Not. Bot. Gard. Edinb. 5: 212. 1912; Hutch. in Curtis's Bot. Mag. 145, t. 8815. 1919; Tagg in Stevenson, Spec. Rhodod. 546. 1930; Cowan in Not. Bot. Gard. Edinb. 20: 86. 1940; 中国高等植物图鉴3: 96, 图4146. 1974; Cullen et Chamb. in Not. Bot. Gard. Edinb. 37: 332. 1979; Chamb. in Not. Bot. Gard. Edinb. 39:393. 1982; 云南植物志4: 440. 1986.

知识共享:署名-非商业性使用-禁止演绎 1994《中国植物志》第57(2)卷 297页 PDF

Dwarf shrubs 1–2.5 m tall; older branches glabrous; young shoots white-floccose, sometimes with some setae. Petiole 5–10 mm, white floccose very quickly glabrescent; leaf blade leathery, narrowly elliptic, obovate to oblanceolate, 4–10 × 1.6–4 cm; base rounded to cuneate; margin revolute; apex obtuse, with a rigid apiculus; abaxial surface indumentum 1-layered, continuous, silvery white to fawn, compacted, hairs rosulate; adaxial surface green, rugose, glabrous when mature; midrib grooved adaxially; lateral veins 7–14-paired, impressed adaxially. Inflorescence umbellate, 2–8-flowered; rachis 5–8 mm, puberulent. Pedicel 1.3–2.5 cm, rufous-tomentose; calyx cupular, fleshy; lobes 5, 2–3.5 mm, puberulent, margin ciliate; corolla tubular-campanulate fleshy, yellow flushed red or orange-red, 3.5–4 cm, with 5 deeply colored nectar pouches at base, glabrous; lobes 5, suborbicular; stamens 10, 1.7–2.6 cm, filaments pubescent at base; ovary conoid, ca. 5.2 × 4 mm, rufous-tomentose or glandular-hairy; style ca. 2.6 cm, glabrous. Capsule cylindric, 10–15 × 4–6 mm. Fl. May.

Forests, alpine thickets, alpine meadows, rocky slopes, cliffs; 2600–4300 m. W Yunnan [Myanmar].

知识共享:署名-非商业性使用-禁止演绎 FOC Vol.14PDF
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