结球马先蒿 jie qiu ma xian hao

Herbs annual, to more than 60 cm tall, drying black. Branches whorled, short, slender. Leaves in whorls of 4 or 5; petiole short; leaf blade ± oblong, ca. 2.5 X 1 cm, pinnatisect; segments more than 10 pairs, oblong-linear, pinnatilobate, incised-double dentate. Bracts linear. Calyx tubular, ca. 4.5 mm; lobes 5, ± equal, serrate, glabrous. Corolla purple, ca. 6 mm, glabrous; tube erect, barely as long as calyx; galea bent at a right angle, prolonged into a beak apically; beak straight, ca. 5.5 mm, slender; lower lip ca. 3.5 X 3 mm, middle lobe smaller than lateral lobes, narrowly ovate. Filaments glabrous.

* W Hubei.