Phytologia Balcanica 31: 75-80, doi: 10.3897/phytolbalcan.31.e161718
Taxonomy and distribution of three alien species of Senecio s.l. (Asteraceae) in Greece
Kit Tan‡, Giannis Kofinas§, George Zarkos|‡ University of Copenhagen, Copenhagen, Denmark§ Unaffiliated, Attikis, Greece| Unaffiliated, Korinthias, Greece
Corresponding author: Kit Tan ( kitt@bio.ku.dk ) Academic editor: Vladimir Vladimirov © Kit Tan, Giannis Kofinas, George Zarkos. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Citation:
Tan K, Kofinas G, Zarkos G (2025) Taxonomy and distribution of three alien species of Senecio s.l. (Asteraceae) in Greece. Phytologia Balcanica 31: 75-80. https://doi.org/10.3897/phytolbalcan.31.e161718 |  |
Abstract
Senecio angulatus and S. tamoides (Asteraceae), two species native to South Africa and naturalized in Greece are described and illustrated by photographs. A third species Roldana petasitis (syn. Senecio petasitis) native to Central America is similarly treated. The flowers resemble each other but the plants differ most clearly in their leaves. In S. angulatus the leaves are truncate or cuneate at base, entire or shallowly lobed while in S. tamoides the leaves are hastate or cordate at base and acutely angular-lobed. Roldana petasitis differs in having Petasites-like leaves, densely pubescent stems and involucres without supplementary phyllaries. It is a first report for the alien Greek flora. Distribution, ecological and habitat notes are provided for all three species together with a map of known occurrences in Greece.
Keywords
Central America, naturalized aliens, Roldana petasitis, Senecio angulatus, S. tamoides, South Africa