This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/jse.12527. This article is protected by copyright. All rights reserved. Accepted Article Sheng-Wei Wang ORCID iD: 0000-0002-8785-5065 Research Article Floristic composition and endemism pattern of vascular plants in Ethiopia and Eritrea Shengwei Wang 1,2,§ , Biyansa H. Boru 1,2,4,§ , Antony W. Njogu 1,2 , Anne C. Ochola 1,2 , Guangwan Hu 1,3 , Yadong Zhou 1,3,* , Qingfeng Wang 1,3 1 Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, and Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China 2 University of Chinese Academy of Sciences, Beijing 100049, PR China 3 Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan, Hubei, 430074, PR China 4 Ambo University, Ambo, 19, Ethiopia § These authors contributed equally to this work * Corresponding authors: Yadong Zhou (zhouyd@wbgcas.cn) Abstract Traditional attempts to delineate floristic regions typically based on the qualitative analysis of species distribution, often ignoring the phylogenetic relationship among their taxa have been frequently employed. Ethiopia and Eritrea are among the horn of Africa, known as one of the