湖北楠木属一新变种——裂叶白楠  

A New Variety of Phoebe Nees from Hubei,China——Phoebe neurantha(Hemsl.)Gamble var. lobophylla Y.J.Fei

作　　者：孙兵[1] 肖波[1] 于鹏宇[1] 潘晓 费永俊[1] SUN Bing;XIAO Bo;YU Pengyu;PAN Xiao;FEI Yongjun(Germplasm Resources Evaluation and Innovation Center of Phoebe Nees and Machilus Nees,Yangtze University,Jingzhou,Hubei 434025,China)

机构地区：[1]长江大学楠木种质资源评价及创新中心,湖北荆州434025

出　　处：《西北植物学报》2018年第8期1567-1570,共4页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金(31270740);湖北省科技支撑计划(2013BBB24);湖北省自然科学基金(2014CFB264;2017CFB390);湖北省教育厅指导性项目(B2015444)

摘　　要：报道了楠木属一新变种——裂叶白楠[Phoebe neurantha(Hemsl.)Gamble var.lobophylla Y.J.Fei]。该变种(裂叶白楠)与白楠[Phoebe neurantha(Hemsl.)Gamble]的区别在于叶片中部到距叶尖1/3处叶片宽度陡然变窄,若有强健侧脉支持则叶片发生裂刻,若无,叶片变狭长,两种变异均存在叶片先端变狭,且呈狭长弯镰状;叶脉下陷更深,侧脉与主脉的夹角逐渐变大,最终呈羽状分布,且越靠近叶尖侧脉分布越密集,单侧侧脉数为25~40;裂刻处叶缘无革质化,粗糙且常具细毛。且这些性状能够稳定遗传给下一代。凭证模式标本现藏于武汉植物园标本馆(编号Y.J.Fei002,HIB)。A new variety of Phoebe Nees,Phoebe neurantha(Hemsl.)Gamble var.lobophylla Y.J.Fei was reported in Hubei Province,China.It was different to Phoebe neurantha(Hemsl.)Gamble that the leaf width was distinctly narrowed between the middle part of leaf and 1/3 from the tip of leaf.There are strong lateral veins supporting the leaf margins.The leaves were lobed,and if not,the leaves become narrowed.The two variants are narrowed and narrow in the apex.The apex part were leptophyllous,gradually pointed and curved in the two variants.The veins fall deeper compared with the P.neurantha.The angle between the lateral veins and the main veins gradually increased and eventually feathered.The closer the leaf tip is,the more dense the lateral veins become.The number of unilateral veins was 25-40.It was found that the leaf edge of the lower surface of P.neurantha(Hemsl.)Gamble var.lobophylla Y.J.Fei was non keratinized,rough and ciliate.Moreover,these traits can be stably inherited to offspring.Holotype was deposited in the herbarium of Wuhan Botanical Garden(numbering Y.J.Fei002,HIB),China.

关 键 词：楠木属 裂叶白楠 新变种 

分 类 号：Q947.747.5[生物学—植物学]