5. Stachyurus retusus Y. C. Yang, Contr. Biol. Lab. Sci. Soc. China. 12: 105. 1939.
凹叶旌节花 ao ye jing jie hua
Stachyurus szechuanensis W. P. Fang, Icon. Pl. Omei. 2(1): t. 103. 1945.
Shrubs deciduous, 2-3 m tall. Petiole 1-2 cm; leaf blade suborbicular, 6-10 × 4-9 cm, papery, abaxially white puberulous to glabrous, adaxially glabrous, lateral veins 5- or 6-paired, ascending, anastomosing at margin, conspicuously raised on both sides, base obtuse or slightly cordate, margin slightly revolute, remotely serrate, apex obtuse or emarginate, rarely subtruncate or slightly retuse. Spikes nodding, 2-5 cm; peduncles nearly absent. Flowers sessile; bract broadly triangular-ovate, ca. 2 mm; bracteoles ovate, apex acute. Sepals greenish, ovate. Flower buds yellowish blue. Mature flowers not seen. Ovary ovoid, glabrous; styles very short, longer than ovary. Fruit globose, ca. 6 mm in diam. Fl. May, fr. Jul. 2n = 24*.
● Mixed forests and thickets on mountain slopes; 1600-2500 m. Sichuan, NE Yunnan (Yiliang).
This species is easily distinguishable from other species in the genus by having suborbicular leaves usually obtuse or emarginate at their apices. The leaf blade is adaxially sometimes densely white puberulous, but often subglabrous or glabrous.