小叶散爵床 xiao ye san jue chuang

Justicia diffusa var. prostrata Roxburgh ex C. B. Clarke; Rostellaria hedyotidifolia Nees; Rostellularia diffusa (Willdenow) Nees; R. diffusa var. hedyotidifolia (Nees) Kumari; R. diffusa var. prostrata (Roxburgh ex C. B. Clarke) H. S. Lo; R. hedyotidifolia (Nees) Nees.

Herbs 10-30 cm tall. Stems 4-angled, procumbent and diffuse, sulcate, sparsely pubescent. Petiole ca. 2 mm, pubescent; leaf blade lanceolate-elliptic, subcircular, or ovate, (0.7-)2-5 × 0.7-1.5 cm, glabrous or minutely pubescent, secondary veins 2-4 on each side of midvein, base cuneate, margin entire, apex acute. Spikes (1.5-)2.5-5 cm, neither dense nor cylindric, sparsely hirsute; bracts oblong-lanceolate, 2-3 × ca. 1 mm, sparsely pubescent; bracteoles linear, ca. 2.5 × 1 mm, sparsely pubescent. Calyx 3.5-5 mm, outside sparsely pubescent, 4- or 5-lobed; lobes lanceolate, margin ciliate, apex acute. Corolla purplish red, ca. 6 mm; lower lip, 3-lobed, sparsely puberulent; upper lip emarginate. Staminal filaments ca. 4 mm, hirsute; anther thecae superposed, lower one spurred at base. Ovary pubescent; style ca. 5 mm, pubescent. Capsule oblong, ca. 5 mm, subglabrous to pubescent. Seeds subsmooth. 2n = 18.

Grasslands, streamsides, sandy places. Fujian, Guangdong, Guangxi, Hainan, Taiwan, Yunnan [Bangladesh, India, Myanmar, Sri Lanka, Thailand, Vietnam].