Impatiens lobulifera S. X. Yu, Y. L. Chen & H. N. Qin, sp. nov.
ABSTRACT
Impatiens lobulifera (Balsaminaceae), a new species from limestone areas in southwestern Guangxi Zhuangzu Autonomous Region, China, is described and illustrated. The characters of its seed micromorphology and pollen morphology under SEM are given. It is similar to I. verrucifera in having succulent stems, peduncles 4-5 mm long, tufted pedicels and connate distal lobes of lateral united petals, but differs in having ovate or ovate-orbicular leaf blades, 4-5-flowered peduncle, yellow-green flowers, outer lateral sepals ovate-orbicular, inner lateral sepals ovate-lanceolate and topped with four finger-like lobes.
Key words: Balsaminaceae; China; Guangxi; Impatiens lobulifera; Impatiens morsei; Impatiens musyana; Impatiens verrucifera; Limestone areas; New species; Pollen morphology; Rare species; Seed morphology.
Impatiens lobulifera S. X. Yu, Y. L. Chen & H. N. Qin, sp. nov.
TYPE: China. Guangxi Zhuangzu Autonomous Region, Baise Shi, Napo Xian, Pingmeng Xiang, Nianjing Cun, 23°00’29.6’’ N, 105°52’24.9’’E, alt. ca. 800 m, shady places in limestone areas, 30 Aug 2004, S. X. Yu 3220 (holotype: PE, here designated; isotype: IBK).
Affinis I. verruciferae Hook. f., sed foliorum laminis ovatis vel ovato-orbiculatis, pedunculis 4-5 mm longis, 4- vel 5-floris, floribus flavo-virentibus, sepalis lateralibus exterioribus ovato-orbiculatis, conchatis, interioribus ovato-lanceolatis, apice 4-lobatis digitiformibus differt.
Figure 5. Distribution of Impatiens lobulifera (★) in China.
Figure 2. Impatiens lobulifera (A-G). A, Habit; B, Flower, face view; C, Fruit; D-G, Flower, different views.
Figure 2. Impatiens lobulifera (A-G) and I. morsei (H-J). A, Habit; B, Flower, face view; C, Fruit; D-G, Flower, different views; H, Habit; I, Flower; J, Fruit.
Figure 1. Impatiens lobulifera S. X. Yu, Y. L. Chen & H. N. Qin. A, Habit; B, Flower (face view); C, Outer lateral sepal; D, Inner lateral sepal; E, Lower sepal; F, Dorsal petal; G, Lateral united petal, 1: basal lobe, 2: distal lobe; H, Fruit; I, Androecium. Drawn by Y. B. Sun from S. X. Yu 3220 (holotype, PE).
Sheng-Xiang YU, Yuan-Tong HOU, Yi-Lin CHEN, and Hai-Ning QIN. 2009. Impatiens lobulifera (Balsaminaceae), a new species from limestone areas in Guangxi, China. Botanical Studies. 50: 365-370.:
