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Parasyncalathium J.W. Zhang, Boufford & H. Sun (Asteraceae, Cichorieae): A new genus endemic to the Himalaya-Hengduan Mountains

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Abstract:

A new Himalaya-Hengduan Mountains endemic genus, Parasyncalathium J. W. Zhang, Boufford & H. Sun (Asteraceae, Cichorieae, Lactucinae) is described. Parasyncalathium is based on Syncalathium souliei (Franch.) Y. Ling, originally placed in Lactuca sect. Aggregatae Franch., as L. souliei Franch., then later moved to Syncalathium Lipschitz. Previous published evidence from cytology, molecular phylogeny, and morphology, and especially SEM of cypsela morphology in the present study confirm the difference between Syncalathium souliei and Syncalathium s. str., the latter including the type species of the genus, S.kawaguchii (Kitam.) Y. Ling. Syncalathium s.str. should be placed in subtribe Crepidinae (Asteraceae, Cichorieae); S. souliei, although distinct from other members of the subtribe, remains in Lactucinae where it groups within Lactuca s.l. in the tree topology.

Keywords: ASTERACEAE; CYPSELA MORPHOLOGY; HIMALAYA-HENGDUAN MOUNTAINS; PARASYNCALATHIUM; SYNCALATHIUM

Document Type: Research Article

Affiliations: 1: Key Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, P.R. China 2: Harvard University Herbaria, 22 Divinity Avenue, Cambridge, Massachusetts 02138-2020, U.S.A. 3: Key Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, P.R. China;, Email: hsun@mail.kib.ac.cn

Publication date: December 1, 2011

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