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Current issue: Volume 23, No. 1 (2023)
DOI: https://doi.org/10.59893/abud.23(1).003
Evarts-Bunders P., Evarte-Bundere G., Bojāre A., Medne M. 2023. Rosa cieselskii Błocki or Rosa × subcollina (Christ) Dalla Torre & Sarnth. – which species does occur in Latvia? Acta.Biol. Univ. Daugavp., 23(1): 29–39.
Abstract
Rosa cieselskii Błocki, an obscure taxon, was included in the latest flora lists in Flora of Baltic States, commonly recognized as a widespread endemic rose species from Western Ukraine. During our studies, all available materials in large Latvian herbaria (HBA, DAU, LATV) were analysed. In addition, the largest part of the previously known localities of R. cieselskii were re-inventoried. At least 75 % of the historical and present localities of R. cieselskii occurred in parks, greeneries of villages and private houses, abandoned anthropogenic places and similar sites, as well as disturbed roadsides, where the species most likely grows subspontaneously. Rosa cieselskii was found in semi-natural places in few sites of the Daugava Valley and SБlija region. During the re-inventory, it was concluded that the species is no longer found in most of the earlier known sites in parks and plantations, which clearly indicates that the species is most likely an anthropophyte. Analysing the morphological characters of R. cieselskii, we found that the previously identified material of R. cieselskii is not homogeneous, and, in most cases, correspond to the morphologically similar species of hybridogenic origin R. × subcollina (Christ) Dalla Torre & Sarnth., which is relatively widespread in Northern Europe and the neighbouring countries around Latvia. We concluded that R. cieselskii is not found in Latvia, similarly as it is elsewhere in the Baltic region, while R. × subcollina is not a taxon of wild origin, has been cultivated since ancient times in the Baltic States and is well naturalised.
Keywords: Latvia, distribution, Red Data Book, Rosa subcollina, systematics.
*Corresponding author: Pēteris Evarts-Bunders. Daugavpils University, Institute of Life Sciences and Technology, Parādes Str. 1A, Daugavpils, LV-5401, Latvia, E-mail:peteris.evarts@biology.lv
Gunta Evarte-Bundere, Aiva Boj‚re, Maija Medne. Institute of Life sciences and Technology, Daugavpils University, Parādes Str. 1A, Daugavpils, LV-5401, Latvia
Gunta Evarte-Bundere. Joint Stock Company “Latvia’s State Forests”, Vaiņodes Str. 1, Rīga, LV-1004, Latvia
Aiva Bojāre. Dendroflora Department, National Botanical Garden, Miera Str. 1, Salaspils, LV-2169, Latvia
