Abstract
Werneria villosa is a species well defined by its yellow ray limbs. In the recent monograph of the genus Werneria, a few populations from northwestern Argentina displaying white ray limbs were tentatively also included in this species following previous authors and because of lack of information for making an accurate taxonomic decision. However, as a result of field‐work carried out in Salta and Jujuy, I have concluded that the plants with white ray limbs correspond to a distinct taxonomic entity and, accordingly, it is here described as the new species W. praetermissa. Detailed pictures of living plants, distribution maps and a dichotomous key to the Argentinian Werneria species is presented.
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