Impatiens rapiformis, a new species of Impatiens with root tuber from Yunnan, China

Abstract

Impatiens rapiformis (Balsaminaceae), a new species from Malipo County, Yunnan, China, is described and illustrated. The new species is superficially similar to I. apalophylla, I. malipoensis and I. guizhouensis, but differs by having cylindric or subfusiform root tuber, elliptic or obovate-oblong leaf blades and falcate outer lateral sepals. The characters of its seed micromorphology and pollen morphology under SEM are given. A preliminary molecular phylogenetic study suggests that I. rapiformis should be placed in I. subg. Clavicarpa.

Description of a New Species and Lectotypification of Two Names in Impatiens Sect. Racemosae (Balsaminaceae) from China

“…Specimens were collected, preserved, and deposited in the Herbarium of Wuhan Botanical Garden, Chinese Academy of Sciences (HIB) for further identification. We then dissected the flower and carefully reviewed related literature [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]36,37] and herbaria specimens in a bid to ascertain the identity of the collected species. However, we were unable to match the new plants with any described species based on morphology.…”

“…The Flora of China lists 227 species, of which 187 are endemic [14]. According to Du et al [15], a total of 69 new taxa of Impatiens have been described in China between 2000 and 2019, and 13 new taxa [16][17][18][19][20][21][22][23][24][25][26][27][28] and three new records [28][29][30] have been published in the last two years, bringing the total species reported for China to nearly 290.…”

Impatiens liupanshuiensis (Balsaminaceae), a new species from Guizhou, China

“…In China, 349 species of Impatiens have been recorded ( Yuan et al in press ), the overwhelming majority of them being distributed in the southwest region, including Yunnan, Sichuan, Tibet and Guizhou ( Chen 2001 ; Yu 2012 ). Since 2021, according to our incomplete statistics, eight new species of Impatiens have been described from China ( Gu et al 2021 ; Liao et al 2021 ; Peng et al 2021a , b ; Song et al 2021a , b , c ). In Guizhou, 61 species of Impatiens have been recorded ( Peng et al 2021a ; Yu et al 2021 ).…”

Two New Species of Impatiens from China, and Taxonomic Insights into the Longifilamenta Group, Which Is Endemic to China

“…Due to their beautiful appearance and long flowering period, many species of Impatiens are grown all over the world as ornamental plants [7]. Many new species of Impatiens have been discovered and described in recent years [8][9][10][11][12][13][14][15]. There are more than 280 species of Impatiens distributed in China [5,16,17].…”

“…Clavicarpa and subgen. Impatiens [15], based on both morphological and molecular evidence, and the latter was further subdivided into seven sections: Semeiocardium, Racemosae, Fasciculatae, Impatiens, Tuberosae, Scorpioidae, and Uniflorae.…”