Page 41 - 《广西植物》2020年第10期
P. 41

1 4 2 4                                广  西  植  物                                         40 卷
       Gui L. Zhang)ꎮ 该新种在叶片的形状和毛被、花的颜色、花序短于叶片以及雌蕊无毛等性状上与产自广西那坡
       的垂花蛛毛苣苔(P. nutans D. Fang & D. H. Qin)最为相似ꎮ 两者的主要区别在于:该新种的花萼裂片先端最宽
       且光滑无毛ꎬ花冠浅宽钟形、花冠筒不明显、花冠管内面基部白色ꎬ花丝无毛以及蒴果稍微扭曲ꎻ该新种生于云南
       海拔 530~610 m 的河口及马关一带ꎬ而垂花蛛毛苣苔产于广西那坡的海拔 900~1 150 m 段的石灰山ꎮ 此外还讨
       论了该新种与蛛毛苣苔属其他几种基生叶类型的近缘种[如三萼蛛毛苣苔(P. trisepala W. H. Chen & Y. M.
       Shui)、蔓耗蛛毛苣苔(P. manhaoensis Y. M. Shui & W. H. Chen) 及河口蛛毛苣苔(P. hekouensis Y. M. Shui &
       W. H. Chen)]的区别ꎬ并提供了相关物种的彩色图片及区分说明ꎬ主模式标本存放于中国科学院昆明植物研究
       所标本馆(KUN)中ꎮ 近年来ꎬ由于中越边境的石灰岩地区不断有新分类群或新记录物种的发现ꎬ所以很有必要
       加强对该区域的植物多样性考察ꎮ
       关键词: 蛛毛苣苔属ꎬ 新类群ꎬ 石灰岩地区ꎬ 分类学ꎬ 云南植物区系



                                                     specimens and the related literature of Paraboea from
   1  Introduction                                   the adjacent regionsꎬ we concluded that this plant
                                                     represents a new species to science (Wang et al.ꎬ 1990ꎬ
       The genus Paraboea ( C. B. Clarke) Ridl. has  1998ꎻ Li & Wangꎬ 2005ꎻ Chen et al.ꎬ 2012ꎻ Xu et al.ꎬ
   become one of the larger genera in the Old World  2017aꎻ Middletonꎬ 2018ꎻ He et al.ꎬ 2018). Hereꎬ the
   Gesneriaceae after the revision ( Xu et al.ꎬ 2008)ꎬ  new speciesꎬ P. nanxiensis Lei Cai & Gui L. Zhangꎬ is

   combination (Puglisi et al.ꎬ 2011)ꎬ transfer (Puglisi et  describedꎬ and  its  morphological  characters  are
   al.ꎬ 2016)ꎬ and descriptions of many new species  compared with the closely related species P. nutans
   (Triboun & Middletonꎬ 2012ꎬ 2015ꎻ Guo et al.ꎬ 2016ꎻ  D. Fang & D. H. Qin (Fig. 2: A-E).
   Wen & Weiꎬ 2016ꎻ Xu et al.ꎬ 2017aꎻ Middletonꎬ
   2018ꎻ Averyanov et al.ꎬ 2020). Up to now it includes  2  Taxonomy treatment
   more than 130 species mainly distributed in the eastern
   Himalayas and Indo ̄China Peninsula and the adjacent   Paraboea nanxiensis Lei Cai & Gui L. Zhangꎬ
   areas (Puglisi et al.ꎬ 2015ꎻ He et al.ꎬ 2018). China  sp. nov. (Fig. 1)

   harbours a high diversity of Paraboea with many       Type: CHINA. Yunnan Province: Hekou Countyꎬ
   endemic species (Middletonꎬ 2018)ꎬ and hithertoꎬ 33  Nanxi Townshipꎬ Baishaheꎬ Laolongtianꎬ 22°41′56″ Nꎬ
   species are recorded in South and Southwest Chinaꎬ  103°57′ 19″ Eꎬ alt. 536 mꎬ on the rocks under the
   such as Guangdongꎬ Guangxiꎬ Guizhou and Yunnan    tropical rainforest in karst regionꎬ in floweringꎬ 14 July
   (Wang et al.ꎬ 1990ꎬ 1998ꎻ Li & Wangꎬ 2005ꎻ Chen et  2017ꎬ G.L. Zhang et al. CL2017085 (holotype KUN!ꎬ
   al.ꎬ 2012ꎻ Xu et al.ꎬ 2017bꎻ Lu et al.ꎬ 2019ꎻ Wen et  isotypes KUN! IBK!).
   al.ꎬ 2019).                                           Diagnosis: The new species is morphologically

       In the floristic surveys in the limestone areas of  similar to Paraboea nutans in the obovate leaf blade with
   southeastern Yunnanꎬ China in 2016ꎬ we discovered a  cobwebby ̄woolly and brownish woolly hair on both sidesꎬ
   plant belonging to the Subfamily Didymocarpoideaeꎬ  absent or short petiole and purplish blue flowersꎬ but it
   Family Gesneriaceae. We confirmed it belonged to the  can be easily distinguished from P. nutans by its calyx
   genus Paraboea when we observed its flower and fruit  lobes oblong to oblanceolateꎬ glabrousꎬ corolla broadly
   characteristics ( such as: two fertile stamensꎬ twisted  shallow campanulateꎬ tube inside white below the
   capsule and cobwebby ̄woolly hair on the leaf blade) in  middleꎬ filament glabrous and capsule slightly twisted.
   the following years. After a careful examination of the  Description: Perennial herbsꎬ stemless. Leaves
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