Figure 2. Proliferation, differentiation and transplanting of Dryopteris fragrans callus (A) Callus of Dryopteris fragrans before proliferation; (B) Callus of D. fragrans after 60 d of proliferation; (C) Differentiation of callus and formation of bud of D. fragrans; (D)-(H) Spore body of D. fragrans with bud differentiation; (I) The sporophyte of D. fragrans after domestication. Bars=1 cm