Page 60 - 《广西植物》2020年第10期
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10 期                   陆昭岑等: 微花蛛毛苣苔在中国云南的发现及其补充描述                                         1 4 4 3

   to faceꎬ ellipticꎬ 3. 0 - 3. 3 mm longꎬ glabrousꎻ  Xu et al. 13931 (IBK & HN).
   staminodes 3ꎬ glandular ̄puberulentꎬ lateral ones 1.0  The flora of Sino ̄Vietnamese limestone karsts
   mm longꎬ adnate to ca. 1 mm above the corolla tube  belongs to the Tonkin gulf region in Paleotropic
   baseꎻ middle one ca. 0. 2 mm longꎬ adnate to the  Kingdom (Wu et al.ꎬ 2010)ꎬ and also rich in rare and

   corolla tube base. Pistil glabrousꎬ ovary 4 - 5 mm  endemic plants. In recent yearsꎬ many new genera or
   longꎬ ca. 1.5 mm in diameterꎬ style 4- 5 mm longꎬ  species were found firstly from northern Vietnamꎬ and
   stigma slightly capitate. Capsule straightꎬ 1.2-2.8 cm  also found from southern or southwestern China at lastꎬ
   longꎬ ca. 2 mm in diameterꎬ glabrous ( old dehisced  e.g. Caobangia A. R. Smith & X. C. Zhang (Xu et al.ꎬ
   fruit).                                           2008)ꎬ Xanthocyparis Farjon & Hiep ( Meng et al.ꎬ
       Distribution and habitat: Paraboea minutiflora is  2013)ꎬ Zeuxinella Aver. ( Huang et al.ꎬ 2012 )ꎬ
   found from Ha Giangꎬ northern Vietnam and southeastern  Aspidistra connata H.  ̄J. Tillich ( Xu et al.ꎬ 2010)ꎬ
   Yunnanꎬ Chinaꎬ and only four localities have so far been  Didymoplexis vietnamica Ormd. (Huang et al.ꎬ 2011)ꎬ
   identified during field investigations. Paraboea minutiflora  Sciaphila stellata Aver. (Jiang et al.ꎬ 2011)ꎬ and also

   grows under the forests of limestone karstꎬ at an elevation  including  Paraboea  minutiflora  D.  J.  Middleton
   between 600 m and 1 100 m.                        here. The discovery of Paraboea minutiflora D. J.
       Phenology: Flowering from February to June.   Middleton from Southeast Yunnanꎬ China enlarge its
       Notes: Paraboea minutiflora is similar to Paraboea  distribution localitiesꎬ and is also important to its
   thorelii ( Pellegr.) B. L. Burtt and species in the  research  and  conservation.  Its  biogeographical
   Paraboea martinii (H. Lev. & Vaniot) B. L. Burtt groupꎬ  significance hereꎬ the flora is closely interrelated
   but it is easily distinguished from the latters by some  between the southern and southwestern limestone karsts
   characters (Middletonꎬ 2018). Paraboea minutiflora is  of China and the northern limestone karsts of
   also most similar to Paraboea glanduliflora Barnett in  Vietnam. Sino ̄Vietnamese limestone karsts are naturally

   having glabrousꎬ reflexed calyx and corolla with glandular  integrated areasꎬ and the border just an artificial lineꎬ
   hairs (Xu et al.ꎬ 2008ꎻ Wang et al.ꎬ 2012)ꎬ but differs  can  not  givesalient  vicariances  to  those  local
   from the latter by the upper leaf surfaces covered with  wildlife. The biodiversity of Sino ̄Vietnamese limestone
   brown matted indumentum when youngꎬ but glabrescent
                                                     karsts is so fantasticꎬ but the field surveys are weakꎬ
   at maturity (vs. pubescent)ꎬ the inflorescences terminal
                                                     even blank in some areasꎬ and many species face to
   (vs. subterminal)ꎬ the corolla 9-12 mm long (vs. 18 mm
                                                     severe threats at the same timeꎬ so more further research
   long)ꎬ the capsule straightꎬ 1. 2 - 2. 8 cm long ( vs.
                                                     and conservation works are needed.
   spirally twistedꎬ 3-4 cm long).
                                                         Acknowledgements  The authors are grateful to
       Additional  specimens  examined:   CHINA.
                                                     Mr. LIN Wenhong (IBK) for the beautiful drawingꎬ to
   Yunnan: Malipo Countyꎬ Tianbao Townꎬ 22°59′24.20″
                                                     Dr. WU Lei (CSFI) for his beautiful photo.
   Nꎬ 104° 50′12. 14″ Eꎬ alt. 1 100 mꎬ 20 June 2018ꎬ
   Meng ̄Qi Han & Wei ̄Bin Xu 13883 (IBK). The same
   localityꎬ 10 January 2019ꎬ Xin ̄Xin Zhu & Wei ̄Bin Xu  References:
   13916 ( IBK ). VIETNAM. Ha Giang: Quan Baꎬ
                                                     CHEN WHꎬ MOLLER Mꎬ SHUI YMꎬ et al.ꎬ 2008. A new
   104°56′01.4″ Eꎬ 23°02′55.0″ Nꎬ alt. 900 - 980 mꎬ 18  species of Paraboea ( Gesneriaceae) from a karst cave in
                                                        Guangxiꎬ Chinaꎬ and observations on variations in flower and
   October 2018ꎬ Leonid V. Averyanov et al. VR1000
                                                        inflorescence architecture [ J ]. Bot J Linn Socꎬ 158:
   ( LE01049022 )ꎻ Phong Quangꎬ 104° 54′ 57. 4″ Eꎬ
                                                        681-688.
   22°53′51.5″ Nꎬ alt. 650 mꎬ 17 August 2019ꎬ Wei ̄Bin  CHEN WHꎬ MOLLER Mꎬ ZHANG MDꎬ et al.ꎬ 2012. Paraboea
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