Impatiens tanintharyiensis (Balsaminaceae), a new species from Southern Myanmar

被引:9
|
作者
Ruchisansakun, Saroj [1 ,2 ]
Suksathan, Piyakaset [3 ]
Van der Niet, Timotheus [1 ,4 ]
Saw-Lwin [5 ]
Janssens, Steven B. [6 ]
机构
[1] Naturalis Biodivers Ctr, POB 9517, NL-2300 RA Leiden, Netherlands
[2] Leiden Univ, POB 9517, NL-2300 RA Leiden, Netherlands
[3] Queen Sirikit Bot Garden, Garden Dept, POB 7, Chiang Mai 50180, Thailand
[4] Univ KwaZulu Natal, Sch Life Sci, P Bag X01, ZA-3209 Scottsville, South Africa
[5] Myanmar Floriculturist Assoc, Peoples Sq & Peoples Pk,Ahlone Rd,Dagon Township, Yangon, Myanmar
[6] Botan Garden Meise, Nieuwelaan 38, B-1860 Meise, Belgium
关键词
floral asymmetry; Impatiens; lithophyte; Myanmar; Semeiocardium; taxonomy; ARUNACHAL-PRADESH; INDIA; SEQUENCES; INFERENCE; THAILAND; CHINA;
D O I
10.11646/phytotaxa.296.2.6
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Impatiens tanintharyiensis Ruchisansakun, Suksathan & Saw-Lwin from the Tanintharyi region of Southern Myanmar is described and illustrated as a new species. The presence of connate lateral united petals and a four-locular ovary, as well as results of molecular phylogenetic analyses of nuclear ITS and plastid atpB-rbcL spacer DNA sequences, suggest that the new species is a member of Impatiens section Semeiocardium (Zoll.) S.X. Yu & Wei Wang. The new species is morphologically most similar to I. spectabilis Triboun & Suksathan, but can be distinguished by its asymmetric flowers, saccate-bucciniform lower sepal, and shorter, slightly incurved spur. Floral traits, including the presence of a large floral chamber with a wide entrance, are consistent with the bee-pollination syndrome in Impatiens. Since I. tanintharyiensis is only known from two small populations, its conservation status is assessed as Endangered.
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页码:171 / 179
页数:9
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