Journal
PHYTOTAXA
Volume 170, Issue 4, Pages 259-268Publisher
MAGNOLIA PRESS
DOI: 10.11646/phytotaxa.170.4.3
Keywords
Cichorieae; Compositae; Lapsanastrum; molecular phylogeny; morphology; Pseudoyoungia
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Funding
- National Natural Science Foundation of China (NSFC) [31000101, 31370004]
- Traditional Chinese Medicine Public Health Special Project [[2011]76, 201207002]
- International Partnership Program for Creative Research Teams (CAS/SAFEA)
- Hundred Talents Program of the Chinese Academy of Sciences [2011312D11022]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB03030106]
- NSFC-Yunnan Natural Science Foundation Unite Project [U1136601]
- German Academic Exchange Service (Deutscher Akademischer Austausch Dienst, DAAD)
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Youngia zhengyiana, a new species of Youngia sect. Mesomeris (Asteraceae: Crepidinae) from Guizhou province of south China is described and illustrated. The placement of this species within Youngia is assessed based on a molecular phylogenetic analysis of the nuclear ribosomal ITS and on morphological comparisons with related species. The new species can be easily distinguished by morphology from the only species known to possess 5 florets, Y. szechuanica. The infrageneric classification and the recently debated circumscription of Youngia are discussed in the light of the nrITS phylogeny, which includes several species for the first time. Pseudoyoungia is confirmed as a congener of Youngia. The redefined Youngia is still non-monophyletic with Lapsanastrum nested within it.
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