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