JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2024, Vol. 48 ›› Issue (3): 27-35.doi: 10.12302/j.issn.1000-2006.202405011

Special Issue: 郑万钧先生诞辰120周年纪念专题

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Review on the systematics of the family Styracaceae

DENG Yunfei()   

  1. Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, Guangzhou 510650, China
  • Received:2024-05-12 Revised:2024-05-16 Online:2024-05-30 Published:2024-06-14

Abstract:

The history of the systematic of the family Styracaceae is reviewed. The multidisciplinary evidences of Styracaceae systematics was censused and it was found that leaf architecture, anatomy, pollen morphology, cytology, chromosome number and molecular systematics are of great value for the circumscription of the family and genus. The basal chromosome number (n) of Styrax is 8 while n=12 in Halesia, Pterostyraxs, Changiostyrax and Sinojackia. The molecular evidences indicate that the family Styracaceae can be divided into four clades, Styrax and Huodendron are two basal divergent clade, Alniphyllum and Bruinsmia form sister groups, and all other genera form a clade. According to these evidences, a new infrafamilial classification of the family is proposed. The family is divided into four tribes, viz., Styraceae, Huodendreae, Alniphylleae and Halesieae. Styraceae include Styrax, Huodendreae include Huodendron, Alniphylleae include Alniphyllum and Bruinsmia, while Halesieae include all other genera; Additionally, Chengiostyrax, a new genus is separated from Pterostyrax.

Key words: Styraceae, systematics, classification, anatomy, molecular systematics

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