栏目

龙岩杜鹃Rhododendron florulentum Tam

龙岩杜鹃Rhododendron florulentum Tam

别名:繁花杜鹃;

科名:杜鹃花科 Ericaceae

属名:杜鹃属 Rhododendron

《中国植物志》第57(2)卷399页
  304.龙岩杜鹃(新拟)繁花杜鹃(植物研究)
  Rhododendron florulentum Tam in Bull. Bit. Rus. 2(4): 80. Pl. 2. 1982, 华南杜鹃花志 37 et 99. 1983.
  灌木;小枝较粗壮,圆柱形,红褐色,被开展的锈色短刚毛和腺头刚毛。叶革质,卵形或椭圆形至椭圆状卵形,不等大,长2.2-8.5厘米,宽1-4.5厘米,通常长5.8厘米,宽3厘米,先端略尖锐,有时微缺,基部宽楔形或近于圆形,上面疏被银色柔毛,下面密被淡黄褐色绵毛及锈色糙伏毛,侧脉约6对,被糙伏毛;叶柄粗壮,长6-10毫米,被开展的的锈色短刚毛及腺头刚毛。伞形花序顶生,通常有花12-14朵;花梗长0.9-1.3厘米,密被亮色糙伏毛;花萼小,杯状,裂片三角形,先端短尖,被糙伏毛;花冠管状漏斗形,淡红色,长2.5厘米,裂片5,狭长圆形或披针状长圆形,长1.2厘米,宽4毫米,顶端短渐尖,边缘浅波状;雄蕊5,不等长,长2.5-2.8厘米,大多数较花柱长,花丝无毛;子房卵球形,长3毫米,密被糙伏毛,花柱纤细,长2.3厘米,无毛。花期5月。
  产福建西南部。生于山坡灌丛或杂木林内。模式标本采自福建龙岩(颜中大队)。
形态特征:灌木;小枝较粗壮,圆柱形,红褐色,被开展的锈色短刚毛和腺头刚毛。叶革质,卵 形或椭圆形至椭圆状卵形,不等人,长1.2--8.5厘米,宽1--4.5厘米,通常长5.8厘 米,宽3厘米,先端略尖锐,有时微缺,基部宽楔形或近于圆形,上面疏被银色柔毛,下 面密被淡黄褐色绵毛及锈色糙伏毛,侧脉约6对, 被糙伏毛;叶柄粗壮,长6—10毫米, 被开展的的锈色短刚毛及腺头刚毛。伞形花序顶生,通常有花12--14朵; 花梗长0.9— 1.3厘米,密被亮色糙伏毛;花萼小,杯状,裂片三角形,无端短尖,被糙伏毛;花冠管 状漏斗形,淡红色,长2.5厘米, 裂片5,狭长圆形或披针状长圆形,长1.2厘米,宽4 毫米,顶端短渐尖,边缘浅波状;雄蕊5,不等长,长2.5—2.8厘米,大多数较花柱长, 花丝无毛;子房卵球形,长3毫米,密被糙伏毛,花柱纤细,长2.3厘米,无毛。 花期 5月。
产地分布:产福建西南部。生于山坡灌丛或杂木林内。模式标本采自福建龙岩(颜中大队)。
参考文献:Rhododendron florulentum Tam in Bull.Bot.Rcs.2(4):80.P1.2.1982,华南 杜鹃花志37 et 99.1983.

《Flora of China》 Vol. 14 (2005)
Rhododendron florulentum  P. C. Tam
龙岩杜鹃   long yan du juan
Shrubs; branchlets short, shortly ferruginous spreading setose and glandular-setose. Spring and summer leaves different. Petiole 6–10 mm, indumentum as for branchlets; spring leaf blade ovate or elliptic to elliptic-ovate, 3.5–8.5 × 1.2–4.5 cm; base broadly cuneate or subrounded; apex subacute to slightly emarginate; abaxial surface densely yellow-brown woolly and ferruginous strigose; adaxial surface with scattered soft silvery hairs; summer leaves 2.2–3.0 cm, otherwise as for spring leaves. Inflorescence 12–14-flowered. Pedicel 0.9–1.3 cm, densely pale strigose; calyx cup-shaped; lobes triangular, small, coarsely strigose, apex acute; corolla tubular-funnelform, rose-pink to reddish purple, ca. 2.5 cm; lobes narrowly oblong or lanceolate-oblong, ca. 1.2 × 0.4 cm, margin shallowly undulate, apex shortly acuminate; stamens 5, unequal, 2.5–2.8 cm, longer than style, filaments glabrous; ovary ovoid, ca. 3 mm, densely strigose; style slender, ca. 2.3 cm, glabrous. Fl. May.
Mixed forests, thickets on mountain slopes. C and SW Fujian, NE Guangdong (Jiaoling).
Rhododendron hepaticum and R. piceum are better treated as synonyms of R. florulentum, not of R. rufulum (R. apricum in the present account) as was given in FRPS (57(2): 400. 1994).

TOP