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| Impatiens macrantha S. X. Yu & Ying Qin in Qin, Xia, Yang, Triboun, ... et Yu, 2021. DOI: 10.1111/njb.02784 Photographed by S. X. Yu and Ying Qin. |
Abstract
Impatiens macrantha S. X. Yu & Ying Qin (Balsaminaceae), a new species from Guangxi, China, is described and illustrated. Phylogenetic analysis based on molecular data shows the new species to belong to I. subg. Clavicarpa and to be closely related to I. tubulosa with which it shares succulent stems and racemose inflorescences, but it can be easily distinguished by having a 4 – or 5 – ridged stem, obovate or elliptic leaf blade, and saccate lower sepal. Furthermore, I. macrantha is distinguishable from other Impatiens in China by its obviously larger leaves and flowers. The evidence from morphology and molecular data both support I. macrantha as new to science.
Keywords: Balsaminaceae, Impatiens subg. Clavicarpa, limestone areas, morphology, phylogeny
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| Impatiens macrantha S. X. Yu & Ying Qin sp. nov. (A) whole plant, (A1) root, (A2) flower branches, (B) bract, (C) flower in front view, (D) flower in lateral view, (E) lower sepal, (F) outer lateral sepal, (G) inner lateral sepal, (H) lateral united petals, (H 1 ) upper petal, (H 2 ) lower petal, (I-J) dorsal petal, (K) filaments and anthers. Drawing by W. H. Lin from Census team of Debao County 451024170927002LY and Y. Qin QY20181030001 (IBK). |
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| (A-G) Impatiens macrantha S. X. Yu & Ying Qin sp. nov. (A) habitat, (B) flower branches, (C) flower in lateral view and raceme, (D) flower in front view, (E) flower in lateral view, (F) flower in apical view, (G) each part of a flower in front view. (H-K) Impatiens tubulosa Hemsley. (H) Habitat, (I) flower in lateral view, (J) flower in front view, (K) each part of a flower in front view. Photographed by S. X. Yu and Ying Qin. |
Ying Qin, Chang-Ying Xia, Xu-Dong Yang, Pramote Triboun, Hoang Thanh Son, Xue-Xue Wu, Zi-Xin Pei and Sheng-Xiang Yu. 2021. Impatiens macrantha (Balsaminaceae) sp. nov., A New Species from Limestone Areas in Guangxi, China. Nordic Journal of Botany. 38(10); DOI: 10.1111/njb.02784
Researchgate.net/publication/355485600_Impatiens_macrantha_a_new_species_from_Guangxi_China
