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| Impatiens longiaristata S. Peng, G. W. Hu & Q. F. Wang, in Peng, Rono, Yang, ... et Wang, 2021. |
Abstract
Impatiens longiaristata (Balsaminaceae), a new species from western Sichuan Province in China, is described and illustrated here based on morphological and molecular data. It is similar to I. longiloba and I. siculifer, but differs in its lower sepal with a long arista at the apex of the mouth, spur curved downward or circinate, and lower petal that is oblong-elliptic and two times longer than the upper petal. Molecular analysis confirmed its placement in sect. Racemosae. Simultaneously, during the inspection of the protologues and type specimens of allied species, it was found that the types of two names from this section were syntypes based on Article 9.6 of the International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code). According to Articles 8.1, 9.3, and Recommendations 9A.1, 9A.2, and 9A.3, the lectotypes of these two names are here designated.
Keywords: lectotype; new taxa; phylogeny; protologue; Sichuan; taxonomy
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| Impatiens longiaristata S. Peng, G. W. Hu & Q. F. Wang. (A) Habit, (B) Leaf, (C) Petiole, (D) Flower buds, (E) Inflorescence, (F) Flower anatomy, (G) Front view of flowers, (H,I) Lateral views of flowers (photographed by Shuai Peng). |
Diagnosis: Impatiens longiaristata is similar to I. longiloba and I. siculifer, but can be distinguished by its lower sepal with a long arista (1 cm) appearance from the bud stage, spur curved downward or circinate, and lower petal that is oblong-elliptic, tip rounded, and two times longer than the upper petal.
Distribution and Ecology: Impatiens longiaristata is currently known only from the type location in Shimian County, Sichuan Province, China. It grows in moist places under broad-leaved forests and frequently in association with Pilea sp., Athyrium sp., Salvia sp., and Impatiens oxyanthera.
Distribution and Ecology: Impatiens longiaristata is currently known only from the type location in Shimian County, Sichuan Province, China. It grows in moist places under broad-leaved forests and frequently in association with Pilea sp., Athyrium sp., Salvia sp., and Impatiens oxyanthera.
Etymology: The specific epithet “longiaristata” is derived from the lower sepal with a long arista at the apex of mouths. It is most conspicuous when the flowers are in bud.
Shuai Peng, Peninah Cheptoo Rono, Jia-Xin Yang, Jun-Jie Wang, Guang-Wan Hu and Qing-Feng Wang. 2021. Description of A New Species and Lectotypification of Two Names in Impatiens Sect. Racemosae (Balsaminaceae) from China. Plants. 10(9), 1812. DOI: 10.3390/plants10091812
Shuai Peng, Peninah Cheptoo Rono, Jia-Xin Yang, Jun-Jie Wang, Guang-Wan Hu and Qing-Feng Wang. 2021. Description of A New Species and Lectotypification of Two Names in Impatiens Sect. Racemosae (Balsaminaceae) from China. Plants. 10(9), 1812. DOI: 10.3390/plants10091812
