The micromorphological features of pericarp surface(MFPS) of 31 species in Angelica s.s.from China were observed under SEM.The result suggests that:(1)The exocarp surface of Angelica s.s.species could be divided into rough type and smooth type,with invisible epidermal cell outline either.(2)Striate ornamentation and lineate ornamentation are recognized,respectively,which are densely/sparsely arranged in parallel/interlaced forms.(3)The accessory structures mainly include trichome,prickle,and branching structure,and granulated secretions are more or less on epidermal surface.Totally,MFPS exhibit rich diversity and certain regularity,which could provide important supplement to mericarp morphological evidence and the significant references for inter-species identification and relationship research.Based on MFPS,four types of these Angelica s.s.species are recognized herein:Type Ⅰ,Exocarp surface without significant ornamentation,including A.dabashanensis,A.dailingensis,A.decursiva and A.omeiensis;Type Ⅱ,Smooth exocarp surface with remarkable ornamentation,including 10 species,such as A.apaensis and A.duclouxii;Type Ⅲ,Rough exocarp surface with interlaced ornamentation including 9 species,such as A.dielsii and A.gigas;Type Ⅳ,Rough exocarp surface with parallel ornamentation including 8 species,such as A.acutiloba and A.sinensis.The infrageneric classification and the identification of affinitive taxa are also investigated,respectively.