重庆荨麻科一新种——缙云赤车  

A New Species of Urticaceae from Chongqing——Pellionia jinyunensis C.Xiong,F.Chen&H.P.Deng

作　　者：熊驰 陈锋 吕信运 邓洪平[1,3] XIONG Chi;CHEN Feng;Lü Xinyun;DENG Hongping(Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation.Institute of Resources Botany,School of Life Sciences,Southwest University,Beibei,Chongqing 400715,China;Chongqing Museum of Natural History,Chongqing 400799,China;Chongqing Research Center for Low Carbon and Ecological Environment,Chongqing Academy of Science&Technology,Chongqing 401123)

机构地区：[1]西南大学生命科学学院资源植物保护与种质创新重庆市重点实验室,重庆北碚400715 [2]重庆自然博物馆,重庆400799 [3]重庆市科学技术研究院低碳与生态环保研究中心,重庆401123

出　　处：《西北植物学报》2021年第3期523-532,共10页Acta Botanica Boreali-Occidentalia Sinica

基　　金：自然保护地典型受损生态系统修复技术研究与应用(cstc2019jscx-tjsbX0005);三峡水库城镇型典型消落带生态修复技术体系研究与集成示范(cstc2018jazx-zdyfxmX0021-02)。

摘　　要：在重庆市北碚区缙云山野外植物调查过程中,于海拔500~800 m的溪边阴湿沟谷中发现一种荨麻科植物,虽然该物种雌花序具花序托,但因其雌花花被片5枚,外面先端具角状突起,瘦果只具瘤状突起,更符合赤车属的特征,且结合分子系统学证据,该物种明显属于赤车属。该物种的特征在于其具花序托和总苞的雌花序,根据这一特征可将其置于头序赤车组(Sect.Elatostematopsis W.T.Wang),与头序赤车(Pellionia cephaloidea W.T.Wang)相似,但与后者区别在于其为草本,叶为羽状脉,侧脉在狭侧2~3条,宽侧3~4条,外层苞片2枚,无毛,背面具1绿色龙骨状突起,内层苞片8~12枚,无毛,背面具1绿色龙骨状突起,雌花花被片背面顶端具角状突起,瘦果椭圆形,具瘤状突起。基于形态学和分子系统学证据,特将它描述为赤车属一新种,命名为缙云赤车(Pellionia jinyunensis C.Xiong,F.Chen&H.P.Deng)。During the investigation of wild plants in Jinyun Mt.,Beibei,Chongqing,we discovered a plant of Urticaceae on valley by stream at an altitude 500-800 m.Although pistillate inflorescences of this species have receptacle,it is more consistent with the characteristics of Pellionia due to the 5 tepals on apex with hornlike projections and achenes tuberculate.Moreover,combined with molecular phylogenetic evidence,this species is obviously belonging to Pellionia.This species is characterized by its pistillate inflorescences with receptacles and involucres,and by this one character it can be placed within Sect.Elatostematopsis W.T.Wang.This species is similar to P.cephaloidea W.T.Wang,but differing from the latter in its herbs,penninerved leaves,secondary nerves 2-3 at leaf narrow side and 3-4 at broad side,2 outer bracts,glabrous,abaxially 1-green-carinate,8-12 inner bracts,glabrous,abaxially 1-green-carinate,tepals on apex with hornlike projections,achenes oblong,tuberculate.Based on the morphological and molecular phylogenetic evidence,we described it as a new species of Pellionia,named Pellionia jinyunensis C.Xiong,F.Chen&H.P.Deng.

关 键 词：荨麻科 赤车属 新种 重庆 

分 类 号：Q949.737.5[生物学—植物学]