58a. Begonia grandis subsp. grandis
秋海棠(原亚种) qiu hai tang (yuan ya zhong)
Begonia discolor R. Brown; B. erubescens H. Léveillé; B. evansiana C. Andrews; B. grandis subsp. evansiana (C. Andrews) Irmscher.
Stem stout. Leaf blade abaxially red or at least red on veins, ovate to broadly so, larger. Filaments connate beyond 2 mm. Capsule with evident, narrow, triangular wings.
● Streamsides in dense valley forests, moist rocky cliffs of valleys, on rocks by streams; 100-1100 m. Anhui, Fujian, Guangxi, Guizhou, Hebei, Henan, Hunan, Jiangxi, Shaanxi, Shandong, Shanxi, Sichuan, Zhejiang.
Begonia grandis var. unialata Irmscher (Mitt. Inst. Allg. Bot. Hamburg 10: 493. 1939) differs in having a capsule with 1 large wing, and the other 2 wings very narrow or nearly absent.