Impatiens angulata S. X. Yu, Y. L. Chen et H. N. Qin sp. nov (Balsaminaceae), a new species from Guangxi, China, is described and illustrated. This species is close to I. hainanensis in morphological characters. Both have succulent stems, 4 lateral sepals, connected upper lobes of lateral united petals, but are distinguished by the base of stems with 6 9 ridges, leaves oblong or oblanceolate, the outer lateral sepals with 9 veins, inner lateral sepals ovate and dorsal sepal with deep bilobate spur.
Impatiens angulata S. X. Yu, Y. L. Chen et H. N. Qin sp. nov (Fig. 1 - 3).
I. hainanensi affinis, sed caulibus angulatis, foliis oblongis vel oblanceolatis, sepalis exterioribus ovato-oribucularis, cuspidatis, venulis 9, sepalis interioribus ovatis, calcari apice profunde bilobato, petalo dorsali dorso crestato bene differt.
Type: China. Guangxi, Longzhou County. Apricus places in the limestone reigon, alt. 200 300 m a. s. l., 2 May 2006, Yu Sheng-Xiang 3777 (holotype PE, isotype IBK).
Fig. 1. Impatiens angulata (photograhped by S. X. Yu from Guangxi). (A) (B) flowers, (C) stem, (D) flower branches, (E) habit.
Fig. 2. Distribution of Impatiens angulata and I. hainanensis.
Fig. 3. Linedrawings from the holotype specimen of Impatiens angulata S. X. Yu, Y. L. Chen et H. N. Qin. (A) habit, (B) blade, (C) flower (lateral view), (D) outer lateral sepal, (E) inner lateral sepal, (F) lower sepal, (G) dorsal petal, (H) lateral united petal, (H1) basal lobe, (H2) upper lobe, (I) fruit. Drawn by Y. B. Sun from S. X. Yu 3777.
Sheng-Xiang Yu, Yi-Lin Chen and Hai-Ning Qin. 2007. Impatiens angulata (Balsaminaceae), a new species from Guangxi, China. Nordic Journal of Botany. 25: 27 30. doi: 10.1111/j.2007.0107-055X.00049.x
