赵天榜,傅大立,孙卫邦,戴惠堂
ZHAO Tian bang 1 FU Da li 2 SUN Wei bang 3 DAI Hui tang 4 (1. Dept. of Forestry; Henan Agricultural University; Henan Zhengzhou 450002;2. Non timber Forestry Research and Development Center of CFA;

• 1:河南农业大学林学系!河南郑州450002
• 2:中国林业科学研究院经济林研究开发中心!河南郑州
• 3:中国科学院昆明植物研究所!云南昆明
• 4:河南鸡公山国家级自然保护区!河南信阳

摘要(Abstract)：

本文发表了中国木兰属一新种 ,即鸡公玉兰 Magnolia jigongshanensis T. B. Zhao,D. L. Fu etW.B.Sun,sp.nov..本新种与罗田玉兰 M.pilocarpa Z.Z.Zhao et Z.W.Xie近似 ,但区别 :幼枝淡黄绿色 ,被短柔毛 .叶薄革质、革质 ,侧脉 5～ 9对 ,背面被弯曲短柔毛 ,具 7种叶型 :1宽椭圆形或宽卵形 ,先端凹裂 ,似凹叶厚朴 ;2倒卵形 ,先端凹 ,似凹叶木兰 ;3倒三角形 ,上部最宽 ,先端凹入 ,具 3裂片 ;4宽倒三角状近圆形 ,上部最宽 ,主脉通常分叉 ,形成 2裂 ,裂片较大 ;5倒卵形 ,先端钝圆 ,具短尖头 ,似玉兰 ;6圆形或近圆形 ,很大 ;7卵形 .花蕾小 ,卵圆体形 ,先端钝圆 ,长 1 .3～ 2 .0 cm,第 1苞鳞外面黑褐色 ,疏被同色短柔毛 .外轮萼状花被片 ,三角形或披针形 ,通常长 1 .0～ 5.0 mm,稀 1 .0～ 1 .5cm,内轮花被片匙状椭圆形 ,浅黄白色 ,外面基部中间淡紫色 .聚合果的基部 艹骨 艹突 果与果序轴宿存 .落叶期早 3 0～ 4 0 d.该新种叶型变异是木兰科中叶形变化最大的一种 ,对于进一步深入开展木兰属植物形变理论研究 ,具有重要意义 .
Magnolia jigongshanensis T B Chao, D.L.Fu et W B Sun, a new species of M of China was reported in this paper The new species appears to be similar to Species M pilocorpa Z Z Zhao et Z W Xie but differences are that the juvenile branchlets yellowish green,with pubesence after glabrate or with pubesence leaves thinly coriaceous or coriaceous, nervis in 5-9 pairs, with dense curvi pubescent beneath, 7 types:① Width ellipse shape or latitude ovate, sunken on the top,likes M officinalis var biloba ;② sunken on the top,likes M. sargentiana ;③ reversed triangle shape,most wide part at the upper part,sunken on the top,has 3 split pieces;④ wide obtrianglar shape,subcirclar,most wide part above the middle part,the main vein always has cross,split to 2 bigger pieces;⑤ obovate, obtuse circle shape on the top with a short tip,likes M. heptapeta; ⑥ circle or subcircle shape,very big;⑦ ovate flower buds smaller, 1 3～2 0cm long,1 0～1 5cm across diameter, ovoid, obtuse at the apex,the first bud scale dark brown with concolorous pubescence, the other with dense pale villi. tepals 9,the externals sepaloid, triangular or lanceolar, usually 1 0～1 5mm long, rare 1 0～1 5cm,the internals spathulate ellipsoid, yellowish white, light purple under the middle of surface; stamina and filaments purple;carpels with dense pubescence syncarpus with the stem on the base of syncarp the deciduous date early 30～40d The species has great variety of leaves shapes It is a species which has most variety of leaves shape in the plants of Magnoliaceae It is significant to study further the theory of variety in Magnolia

关键词(KeyWords)： 中国;木兰属;鸡公玉兰;叶形变异;系统聚类
China; Magnolia ; M. jigongshanensis ;variety of leaces shapes;system cluster

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 赵天榜,傅大立,孙卫邦,戴惠堂
ZHAO Tian bang 1 FU Da li 2 SUN Wei bang 3 DAI Hui tang 4 (1. Dept. of Forestry; Henan Agricultural University; Henan Zhengzhou 450002;2. Non timber Forestry Research and Development Center of CFA;

DOI: 10.16366/j.cnki.1000-2367.2000.01.016

参考文献(References)：

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• 2　中国科学院中国植物志编辑委员会 .中国植物志 [J].1 996,3 0 ( 1 ) :1 0 8～ 1 4 1