栏目

黄平悬钩子Rubus huangpingensis Yü et Lu

黄平悬钩子Rubus huangpingensis Yü et Lu

别名:

科名:蔷薇科 Rosaceae

属名:悬钩子属 Rubus

《中国植物志》第37卷186页
  154.黄平悬钩子 图版25:1-2
  Rubus huangpingensis Yu et Lu,植物分类学报20 (4): 461. pl.4. f.1. 1982.
  攀援灌木;枝疏生微弯小皮刺,深褐色,幼时被绒毛,逐渐脱落,老时近无毛。单叶,近革质,长7-11厘米,宽几与长相等,基部截形至心形,深3裂,分裂至叶片的2/3处,顶生裂片与侧生裂片之间常成直角,稀成锐角;裂片椭圆形或长圆形,长3.5-8厘米,宽2-4 厘米,顶端渐尖,边缘具不整齐的粗锐锯齿,上面无毛,下面密被浅锈色绒毛,叶脉突起;叶柄长3-4厘米,具绒毛,有时脱落近无毛;托叶膜质,离生,长圆形或长圆披针形,长1-1.6厘米,宽4-6毫米,顶端常浅裂或有2-3锯齿,具稀疏细柔毛或无毛。总状花序生于侧生小枝顶端;总花梗、花梗和花萼密被细柔毛并疏生腺毛,总花梗和花梗常具针状小皮刺;花梗长1-1.4厘米;苞片与托叶相似,但稍小;萼片长三角形或三角状披针形,顶端短尾尖,全缘,在果期常反折,稀直立;雄蕊多数,花丝基部宽扁;雌蕊多数,具长柔毛。果实扁球形,红色,直径1-1.4厘米,宿存花柱常具长柔毛;核稍具网纹。花期5-6月,果期7-8月。
  产贵州南部(黄平)。生山顶灌木丛中。
  此种和鸡爪茶R. henryi Hemsl. et Ktze.近似, 但后者叶片3-5深裂(仅其变种较浅裂);裂片披针形或狭长圆形,边缘有稀疏细锐锯齿,顶生裂片与侧生裂片之间常成锐角;花序和花萼无腺毛或仅于花萼疏生腺毛;果实黑色。
形态特征:攀援灌木;枝疏生微弯小皮刺;深褐色,幼时被绒毛;逐渐脱落;老时近无毛。单叶,近革质,长了7-11 厘米,、宽几与长相等,基部截形至心形,深 3裂;分裂至叶片的2-3处,顶生裂片与侧生裂片之间常成直角,稀成锐角;裂片椭圆形或长圆形,长3.5—8厘米,:宽2—4厘米,顶端渐尖,边缘具不整齐的粗锐锯齿,上面无毛;下面密被浅锈色绒毛,叶脉突起;叶柄长3—4厘米,具绒毛,有时脱落近无毛;托叶膜质,离生,长圆形或长圆披针形,长1—1.6厘米,宽4—6毫米,顶端常浅裂或有2—3锯齿,具稀疏细柔毛或无毛。总状花序生于侧生小枝顶端;总花梗 、花梗和花萼密被细柔毛并疏生腺毛;总花梗和花梗常具针状小皮刺;花梗长1—1.4厘米;苞片与托叶相似,但稍小;萼片长三角形或三角状披针形,顶端短尾尖,全缘,在果期常反折,稀直立;雄蕊多数,花丝基部宽扁;雌蕊多数,具长柔毛。果实扁球形,红色,直径1—1.4厘米,宿存花柱常具长柔毛;核稍具网纹。 花期5—6月,果期了一8月。
产地分布:产贵州南部(黄平)。生山顶灌木丛中。
本种提示:此种和鸡爪茶R.Henryi Hemsl.Ct Ktze。近似,但后者叶片3—5深裂(仅其变种较 浅裂);裂片披针形或狭长圆形.边缘有稀疏细锐锯齿, 顶生裂片与侧生裂片之间常成锐 角;花序和花萼无腺毛或仅于花萼疏生腺毛;果实黑色。
参考文献:Rubus huangpingensis Yu et Lu,植物分类学报20,(4):461. P1. 4.F.1.1982.
亚组概述:Subsect;Sozostyli;(Focke)yu et lu,植物分类学报20(4):461.1982.-Sect.Sozostyli Focke,Bibl.Bot。—72(1):42.1910 et 83:22. 1914. 本亚组有下列17种。

《Flora of China》 Vol. 9 (2003)
Rubus huangpingensis  T. T. Yu & L. T. Lu
黄平悬钩子   huang ping xuan gou zi
Shrubs climbing. Branchlets dark brown, tomentose at first, gradually glabrescent, finally glabrous, with sparse, curved minute prickles. Leaves simple; petiole 3–4 cm, tomentose, sometimes glabrescent; stipules free, oblong or oblong-lanceolate, 1–1.6 cm × 4–6 mm, membranous, glabrous or sparsely puberulous, usually lobed or with few teeth apically; blade 7–11 cm and ca. as broad, subleathery, abaxially densely pale rust colored tomentose, adaxially glabrous, base truncate to cordate, palmately 3-parted to 2/3; lobes elliptic or oblong, 3.5–8 × 2–4 cm, veins raised abaxially, slightly impressed adaxially, margin with uneven coarse sharp serrations, apex acuminate. Inflorescences terminal, racemes; rachis and pedicels densely pubescent, with sparse, intermixed stipitate glands and with small needle-like prickles; bracts oblong or oblong-lanceolate, smaller than stipules, glabrous or slightly puberulous, margin entire or slightly lobed or with few teeth, apex acuminate. Pedicel 1–1.4 cm. Calyx densely pubescent, with sparse, glandular hairs; sepals reflexed, rarely erect in fruit, narrowly triangular or triangular-lanceolate, margin entire, apex shortly acuminate. Stamens many; filaments linear, basally broad and flat. Pistils numerous, longer than stamens; style and ovary villous. Aggregate fruit red, compressed globose, 1–1.4 cm in diam.; persistent styles villous; pyrenes slightly reticulate. Fl. May–Jun, fr. Jul–Aug.
Thickets at mountain summits. S. Guizhou.

TOP