Impatiensyunlingensis (Balsaminaceae), a new species from Yunnan, China

Abstract

Impatiensyunlingensis S.X. Yu, Chang Y. Xia & J.H. Yu (Balsaminaceae), a species new to science discovered in Yunnan, China, is described and illustrated here, along with its phylogenetic position among other Impatiens species. Morphological, micro-morphological and molecular evidence is presented as an attestation of its novelty. Impatiensyunlingensis is similar to I.delavayi in having coarsely crenate leave margins, bracts in the upper part, ca. ⁴/₅ length of the pedicels, saccate lower sepal with shallowly bifid spur, linear capsules, and elliptic-oblong, tuberculate seeds, but differs from I.delavayi with lateral sepals 4 (vs. 2), lateral united petal basal lobes subtriangular (vs. dolabriform), and seeds' surface equipped with tubercular ornamentation mostly covered with grain shaped appendages (vs. glabrous and without grain shaped appendages on the top).

Keywords: Morphology; phylogeny; pollen grains; seed micromorphology; taxonomy.