Impatiens sigmoidea Hook. fil.

Plants annual, 50-60 cm tall, glabrous. Stem erect, long naked basally, branched. Leaves alternate; petiole 5-10 mm; leaf blade ovate or ovate-lanceolate, 3-6 × 2-3 cm, base without bristles or 2-setose, attenuate into petiole, midvein abaxially prominent, lateral veins 6 or 7 pairs, margin serrulate, teeth mucronulate, apex acuminate. Inflorescences in upper leaf axils, over subtending leaves, 2-flowered. Pedicels 1-2 cm, bracteate above middle; bracts persistent, ovate-lanceolate, 8-10 mm, apex acuminate. Flowers white or white-green, 1-1.5 cm wide. Lateral sepals 2, ovate, 6-7 mm, S-curved, quite inequilateral, margin entire or inconspicuously denticulate on one side, apex acuminate. Lower sepal funnelform, abruptly narrowed into an incurved spur 2-2.8 cm; mouth vertical, ca. 1 cm, tip cuspidate. Upper petal cucullate, orbicular, abaxial midvein broadly cristate; lateral united petals not clawed, 1-1.3 cm, 2-lobed; basal lobes cuneate or obovate, small; distal lobes clawed, dolabriform, ca. 2 × as long as basal lobes, apex abruptly narrowed and obtuse; auricle conspicuous, obtuse. Filaments short, broad; anthers obtuse. Ovary erect, fusiform. Capsule clavate, ca. 5 cm. Seeds few, 3-5 mm, smooth. Fl. Aug.

● Guizhou (Gaopo Shan, Pingba).

Impatiens sigmoidea adalah spesies tumbuhan yang tergolong ke dalam famili Balsaminaceae. Spesies ini juga merupakan bagian dari ordo Ericales. Spesies Impatiens sigmoidea sendiri merupakan bagian dari genus Impatiens. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Hook.f..

Impatiens sigmoidea là một loài thực vật có hoa trong họ Bóng nước. Loài này được Hook. f. mô tả khoa học đầu tiên năm 1908.

斯格玛凤仙花（学名：Impatiens sigmoidea）为凤仙花科凤仙花属下的一个种。