水蜡烛 shui la zhu

Dysophylla linearis Bentham var. yatabeana (Makino) Kudo; D. lythroides Diels; D. martini Vaniot.

Herbs perennial. Stems 40-60 cm tall, glabrous except for puberulent apex, usually unbranched or rarely short branched. Leaves in whorls of 3 or 4, narrowly lanceolate, 3.5-4.5 cm × 5-7 mm, papery, glabrous, inconspicuously brown glandular, margin entire or obsurely remote serrate toward apex, apex obtuse. Spikes 2.8-7 × ca. 1.5 cm, compact, sometimes interrupted at base; bracts purplish, linear-lanceolate, almost as long as corolla. Calyx ovoid-campanulate, 1.6-2 mm, pilose and rust colored glandular outside; teeth triangular, ca. 1/2 as long as calyx tube. Corolla purple-red, ca. 2 × as long as calyx, glabrous, limb subequally 4-lobed. Stamens much exserted; filaments densely purple-red barbate. Nutlets unknown. Fl. Aug-Oct.

Rice paddies, open wet areas. Anhui, Guizhou, Hunan, Zhejiang [Japan, Korea].