Youngia

Youngia is a genus of Asian plants in the dandelion tribe within the sunflower family. There are several weed species in the genus including the endangered Youngia nilgiriensis from Sispara in southern India, and Youngia japonica, which is also known as Japanese Hawkweed.[4]

Youngia
Youngia japonica
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Tribe:
Cichorieae[1]
Genus:
Youngia

Cass.
Type species
Youngia lyrata
Cass.[2][3]
Synonyms[1]
  • Crepis sect. Youngia (Cass.) Benth.
  • Hieraciodes Möhring ex Kuntze

Youngia was first described in 1831 by H. Cassini,[5] and the genus was later united with Crepis.[6] Taxonomic and cytogenetic studies by E. B. Babcock and G. Ledyard Stebbins led to the reclassification of the genus in the 1930s.[7][8][9]

Species[1]
  • Youngia alashanica
  • Youngia americana
  • Youngia bifurcata
  • Youngia blinii
  • Youngia cineripappa
  • Youngia erythrocarpa
  • Youngia fusca
  • Youngia fuscipappa
  • Youngia hastiformis
  • Youngia henryi
  • Youngia heterophylla
  • Youngia japonica
  • Youngia kangdingensis
  • Youngia lanata
  • Youngia longiflora
  • Youngia longipes
  • Youngia mairei
  • Youngia nansiensis
  • Youngia napifolia
  • Youngia nilgiriensis
  • Youngia nujiangensis
  • Youngia paleacea
  • Youngia pilifera
  • Youngia pratti
  • Youngia pseudosenecio
  • Youngia racemifera
  • Youngia rosthornii
  • Youngia rubida
  • Youngia scaposa
  • Youngia setigera
  • Youngia silhetensis
  • Youngia stebbinsiana
  • Youngia taiwaniana
  • Youngia terminalis
  • Youngia wilsonii
  • Youngia yilingii

References
  1. Flann, C (ed) 2009+ Global Compositae Checklist search for Youngia
  2. lectotype designated by Nelson, C. H. 2008. Catálogo de las Plantas Vasculares de Honduras 1–1576. Secretaria de Recursos Naturales y Ambiente, Tegucigalpa
  3. Tropicos, Youngia Cass.
  4. Flora of China Vol. 20-21 Page 252 黄鹌菜属 huang an cai shu Youngia Cassini
  5. Cassini, Alexandre Henri Gabriel de. 1831. Annales des Sciences Naturelles (Paris) 23: 88-90 descriptions and commentary in French
  6. Bentham & Hooker, Genera Plantarum 2 (1873): 514
  7. Babcock, E.B. and Stebbins, G.L. 1937. The genus Youngia. Carnegie Institution of Washington
  8. Everitt, J.H.; Lonard, R.L.; Little, C.R. (2007). Weeds in South Texas and Northern Mexico. Lubbock: Texas Tech University Press. ISBN 0-89672-614-2
  9. Koh Nakamura et al., 2012. Extreme habitats that emerged in the Pleistocene triggered divergence of weedy Youngia (Asteraceae) in Taiwan. Molecular Phylogenetics and Evolution 63: 486–499.


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