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1 August 2015 Taraxacum umbrosum (Asteraceae, Cichorieae), a New Species Intermediate between sect. Erythrosperma and sect. Erythrocarpa, Widespread in the Balkans
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Abstract

A new, relatively widespread species of Taraxacum from the Balkans, intermediate between sect. Erythrosperma and sect. Erythrocarpa, T. umbrosum Sonck, Kirschner & Štěpánek, is described and illustrated. It occurs in Greece, Bulgaria and F.Y.R. Macedonia, and is characterized by numerous, narrowly-triangular leaf lateral segments, numerous, imbricate, ovate to ovate-lanceolate, dark, distinctly narrowly bordered and conspicuously corniculate outer phyllaries, and brown or castaneous-brown, initially also red-brown achenes usually 4–5 mm long. Taraxacum umbrosum, an agamospermous taxon, is compared with morphologically similar species in sect. Erythrosperma (T. fragosum and T. taraxacoides) and with those in sect. Erythrocarpa (T. olymophilum, T. pindicola, T. dorchocarpum, T. panhellenicum, T. voricola and T. gratum).

© Finnish Zoological and Botanical Publishing Board 2015
Jan Štěpánek and Jan Kirschner "Taraxacum umbrosum (Asteraceae, Cichorieae), a New Species Intermediate between sect. Erythrosperma and sect. Erythrocarpa, Widespread in the Balkans," Annales Botanici Fennici 52(3–4), (1 August 2015). https://doi.org/10.5735/085.052.0304
Received: 30 July 2014; Accepted: 18 December 2014; Published: 1 August 2015
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