Abstract
Stellaria ruderalis is an annual (semi)ruderal species from the S. media group, which has been recently published by Lepší et al., therefore, its distribution range in Europe is insufficiently known. This paper is based on field exploration of 39 localities of S. media s.l. in the Lviv region, Western Ukraine. The first report of S. ruderalis in Ukraine comes from Dmytre village, where it grows at roadsides and arable field edges in a semiruderal habitat of the alliance Aegopodion podagrariae. As only a single population was found, Stellaria ruderalis is obviously still spreading in Western Ukraine, a fact which was reported already for northern Central Europe. This record represents the northeasternmost locality of the species so far known.
Highlights
The Stellaria media group comprises in Europe four species, S. media (L.) Vill., S. pallida (Dumort.) Crép., S. neglecta Weihe, and the recently published one, S. ruderalis M
No herbarium vouchers of S. ruderalis were found in LWS
This can be explained with the fact that such a common species group like Stellaria media s.l. is usually neglected by botanists
Summary
The Stellaria media group comprises in Europe four species, S. media (L.) Vill., S. pallida (Dumort.) Crép., S. neglecta Weihe, and the recently published one, S. ruderalis M. A complex analysis of morphological features (i.e., structure of the inflorescence, length of petals, number of stamens, and shape of tubercules on the seed surface) together with karyological and molecular data allowed distinguishing four species within S. media group in Europe (Lepší et al 2019). Stellaria ruderalis differs from S. media s.
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