Taraxacum porrigens

Bibliography
F. Lundevall, C.-F. & Øllgaard, H., The genus Taraxacum in the Nordic and Baltic countries: types of all specific, subspecific and varietal taxa, including type locations and sectional belonging in Preslia 71: 43-171. 1999
G. Sahlin, C. I., Zur Taraxacum-Flora Süddeutschlands und Österreichs in Memoranda Soc. Fauna Fl. Fenn. 48: 75-84. 1972