栏目

疏花山梅花Philadelphus laxiflorus Rehder

疏花山梅花Philadelphus laxiflorus Rehder

别名:光盘山梅花;

科名:虎耳草科 Saxifragaceae

属名:山梅花属 Philadelphus

《中国植物志》第35(1)卷151页
  6. 疏花山梅花 图29:1-6
  Philadelphus laxiflorus Rehd. in Journ. Arn. Arb. 5: 152. 1924; S. Y. Hu in Journ. Arn. Arb. 36: 97. 1955. ——P. subcanus auct. non Koehne: Hers in Journ. N. China Branch Roy. As. Soc. 53: 113. 1923 et List. Ess. Lign. Honan 20. 1922. ——P. incanus auct. non Koehne: Rehd. op. cit. 5: 153. 1924; Liu in Bull. Peking Soc. Nat. Hist. 2 (3): 103. 1928.
  灌木,高2-3米;二年生小枝灰棕色或栗褐色,表皮薄片状脱落,当年生小枝褐色,无毛。叶长椭圆形或卵状椭圆形,长3-8厘米,宽1.6-3厘米,先端渐尖或稍尾尖,基部楔形,边缘具锯齿,上面暗绿色,被糙伏毛,下面无毛或仅叶脉及脉腋疏被白色长柔毛,叶脉离基出3-5条;叶柄长5-8毫米,无毛或稍被毛;花枝上的叶与无花枝上叶近等大;叶柄长约5毫米,无毛。总状花序有花7-9 (-11) 朵,最下分枝顶端有时具3花呈聚伞状排列;花序轴长3-12厘米,黄褐色;花梗长5-12毫米,无毛;花萼外面无毛或稍被糙伏毛,黄褐色;萼筒钟形,裂片卵形,长约6毫米,宽约4毫米,先端急尖,干后脉纹明显;花冠盘状,直径2.5-3厘米;花瓣白色,近圆形,直径约1.6厘米,背面基部常有毛;雄蕊30-35,最长的长达9毫米;花盘边缘和花柱疏被白色长柔毛或无毛;花柱先端分裂至中部,柱头棒形,长1-1.5毫米,较花药短。蒴果椭圆形,长约6毫米,直径约6毫米;种子长约3毫米,具短尾。花期5-6月,果期8月。
  产陕西、甘肃、青海、河南、山西、湖北。生于海拔770-2000米山坡或山谷林中或灌丛中。模式标本采自陕西太白山。
  根据原始描述,本种的花盘和花柱无毛,胡秀英博士在 Journ. Arn. Arb. 5: 152. 1955. 一文中,又将该特征在检索表中作为与其他种的区别点,但据唐昌林 1392、1568采自原模式产地的两号标本,花盘和花柱均有毛,其他特征又与原始描述相似,可见被毛特征有变异。
  本种与 P. purpurascens (Koehne) Rehd. 接近,但以其花序轴和花萼外面黄褐色,萼片干后脉纹明显,无白粉,可与其区别。

《Flora of China》 Vol. 8 (2001)
Philadelphus laxiflorus  Rehder
疏花山梅花   shu hua shan mei hua
Shrubs 2-3 m tall. Branchlets of previous year grayish brown or brown, those of current year brown, glabrous. Petiole 5-8 mm; leaf blade long elliptic or ovate-elliptic, 3-8 × 1.6-3 cm, abaxially glabrous or white villous along veins, adaxially strigose, veins 3-5, basifugal, base cuneate, margin serrate, apex acuminate or caudate. Racemes 7-9(-11)-flowered, lowest ones usually 3-flowered and cymose; rachis 3-12 cm; pedicels 5-12 mm. Calyx yellowish brown when dry; tube cupular, glabrous or strigose; lobes ovate, ca. 6 × 4 mm, conspicuously veined, apex acute. Corolla discoid; petals white, suborbicular, ca. 1.6 cm, hairy near base abaxially. Stamens 30-35, longest ones ca. 9 mm. Disc margin and style glabrous or sparsely white villous. Style divided for ca. 1/2 its length; stigmas clavate, 1-1.5 mm, shorter than anthers. Capsule ellipsoid, ca. 6 × 6.5 mm. Seeds ca. 3 mm, shortly tailed. Fl. May-Jun, fr. Aug.
* Mixed forests, thickets in valleys, mountain slopes; 800-2000 m. Gansu, Henan, Qinghai, Shaanxi.

TOP