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  2. Taraxacum mirabile, an enigmatic sexual halophilous endemic dandelion, represents a new section

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Taraxacum mirabile, an enigmatic sexual halophilous endemic dandelion, represents a new section

By vojta , 15 March 2021

Taraxacum mirabile Wagenitz (Asteraceae, Cichorieae, Crepidinae), a remarkable but taxonomically unexplored endemic species of Central Anatolia, is examined in detail. It is shown to be a sexually reproducing diploid (2n=16) species. It used to be included in Taraxacum sect. Orientalia in the literature. However, the nrDNA analysis revealed that T. mirabile is remote from that section. Moreover, it exhibits a number of unique features, such as fleshy leaves with a white, cartilaginous apex, long, dense, bright white tomentum at the plant base, multiple root heads, achenes with an extremely short conical cone and with very few minute spinules, a very narrow involucre with imbricate outer phyllaries, and white, not numerous florets. The most specific feature of T. mirabile is the fine, microscopic sculpture of achene surface, consisting of hair-like protuberances, not known in other Taraxacum species. These attributes, together with the convincing result of the nrDNA analysis, qualify T. mirabile to be recognized as a member of a separate section, T. sect. Echinulata, sect. nov. The habitat and distribution of T. mirabile are described, and the character of its endemism is discussed.

https://www.biotaxa.org/Phytotaxa/article/view/phytotaxa.489.1.4 Kirschner et al. 2021, Phytotaxa 489 (1): 049–064

Články
Botanický ústav AV
Taraxacum
Taxonomie
Věda, výzkum, biologie
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