@ARTICLE{TreeBASE2Ref19129, author = {Gechen Zhang and Li-Bing Zhang}, title = {Impatiens shimianensis sp. nov. (Balsaminaceae): A new species from southwest China based on morphological and molecular evidence}, year = {2011}, keywords = {AtpB-rbcL sequence, Balsaminaceae, Impatiens shimianensis, ITS sequence, Sichuan}, doi = {}, url = {http://}, pmid = {}, journal = {Systematic Botany}, volume = {}, number = {}, pages = {}, abstract = {A new species, Impatiens shimianensis (Balsaminaceae), is described and illustrated. Impatiens shimianensis is morphologically most similar to I. delavayi in having ovate or ovate-orbicular leaf shape, crenate leaf margins, and bilobed spurs. The two species differ in that I. shimianensis has orbicular upper petal of lateral united petals and very shortly clawed lateral united petals while I. delavayi has subtetragonous upper petal of lateral united petals and conspicuously clawed lateral united petals. The upper portion of the lower sepal of I. shimianensis is yellow and the lower portion of the lower sepal has brown stripes, whereas the whole lower sepal of I. delavayi is dark purple or pink. In addition, the petals of I. shimianensis are yellow or whitish yellow whereas those of I. delavayi are dirty yellow or pink. Phylogenetic analyses based on DNA sequences from the nuclear internal transcribed spacer (ITS) and the chloroplast atpB-rbcL intergenic spacer showed that I. shimianensis formed a well-supported clade comprising of I. barbata, I. corchorifolia, I. delavayi, and I. poculifer. In addition to these species, a few other morphologically related but molecular-phylogenetically unsampled species were also compared with the species newly discovered. Impatiens shimianensis can easily be distinguished morphologically from all these species by having yellowish white flowers, dark red spur tip, and purple abaxial leaf surface. } }

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