Plants collected in southern France and Italy, identified as Leontodon villarsii (Willd.) Loisel., showed different chromosome numbers (2n = 14 and 2n = 22), distinctly different pollen morphology (triaperturate and tetraaperturate pollen grains), and a different distribution. These plants, especially when dried as herbarium vouchers, are difficult to identify on a mere morphological basis. In spite of this, they should be divided into two distinct species: L. villarsii (Willd.) Loisel. and L. rosani (Ten.) DC. Their nomenclatural types were selected and discussed.
Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology
Official Journal of the Societa Botanica Italiana
Volume 138, 2004 - Issue 2
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