[Alonso M. A., Agulló J. C., Villar J. L., Juan A. & Crespo M. B. 2013. Taxonomic relationships in the Hypericum ericoides aggregate (H. sect. Coridium, Hypericaceae). Ann. Bot. Fennici 50: 195-207.]Search in Google Scholar
[Bojnanský V. & Fargašová A. 2007. Atlas of seeds and fruits of Central and East European Flora. The Carpatian Mountains Region. 1025 pp. Springer, Dordrecht.]Search in Google Scholar
[Bouchard J. 1954. Un Hypericum nouveau pour la flore de France [A new Hypericum for the flora of France]. Bulletin de la Société Botanique de France 101(7-9): 351-354 (in French).10.1080/00378941.1954.10837725]Search in Google Scholar
[Corner E. J. H. 1976. The Seeds of Dicotyledons, 1, 331 pp. Cambridge University Press, Cambridge.]Search in Google Scholar
[Crockett S. & Robson N. 2011. Taxonomy and Chemotaxonomy of the Genus Hypericum. Medicinal and Aromatic Plant Science and Biotechnology 5 (Special Issue 1): 1-13.]Search in Google Scholar
[Hageman I. 1987. On subspecific taxa of Hypericum empetrifolium (Hypericaceae) from Crete. Pl. Syst. Evol. 155: 165-187.10.1007/BF00936297]Search in Google Scholar
[Humphrey C. D. & Pittman F. E. 1974. A simple methylene blue-azure II-basic fuchsin stain for epoxy-embedded tissue sections. Stain Technology 49: 9-14.10.3109/105202974091169294131626]Search in Google Scholar
[Hypericum online. A site dedicated to Hypericum – The St John’s Worts. http://hypericum.myspecies.info/ (accessed 31 July 2019).]Search in Google Scholar
[Jackowiak B., Celka Z., Chmiel J., Latowski K. & Żukowski W. 2013. Checklist of the vascular flora of Wielkopolska (Poland): native species and naturalized alien species. Biodiv. Res. Conserv. 31: 9-96.]Search in Google Scholar
[Jackowiak B., Celka Z., Chmiel J., Latowski K. & Żukowski W. 2017. Checklist of the vascular flora of Wielkopolska (Poland): casual alien species. Biodiv. Res. Conserv. 46: 35-55.10.1515/biorc-2017-0008]Search in Google Scholar
[Mabberley D. J. 2008. Mabberley’s Plant-Book. A portable dictionary of plants their classification and uses. Ed. 3. xviii+1021 pp. Cambridge University Press, Cambridge.]Search in Google Scholar
[Matzk F., Meister A., Brutovská R. & Schubert I. 2001. Reconstruction of reproductive diversity in Hypericum perforatum L. opens novel strategies to manage apomixis. The Plant Journal 26(3): 275-282.10.1046/j.1365-313X.2001.01026.x11439116]Search in Google Scholar
[Meseguer A. S. & Sanmartín I. 2012. Paleobiology of the genus Hypericum (Hypericaceae): a survey of the fossil record and its palaeogeographic implications Anales del Jardín Botánico de Madrid 69(1): 97-10610.3989/ajbm.2306]Search in Google Scholar
[Milanović Đ., Maslo S. & Šarić Š. 2018. Four neophytes new for the flora of Bosnia and Herzegovina. Botanica Serbica 42(1): 139-146. DOI 10.5281/zenodo.1173570]Search in Google Scholar
[Mirek Z., Piękoś-Mirkowa H., Zając A. & Zając M. 2002. Flowering plants and pteridophytes of Poland. A checklist. In: Z. Mirek(ed.). Biodiversity of Poland, 1, 442 pp. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków.]Search in Google Scholar
[Netolitzky F. v. 1926. Anatomie der Angiospermen Samen. In: K. Linsbauer (ed.). Handbuch Der Pflanzenanatomie. Abt. II T. 2 Bd. X, 360 pp. Berlin.]Search in Google Scholar
[Nezadal W. 1984. Wiederfund von Illecebrum verticillatum zusammen mit Radiola linoides, Juncus capitatus und Hypericum majus bei Grafenwohr/Opf. [Rediscovery of Illecebrum verticillatum with Radiola linoides, Juncus capitatus and Hypericum majus near Grafenwoehr (Oberpfalz)]. Berichte der Bayerischen Botanischen Gesellschaft zur Erforschung der heimischen Flora 55: 67-71 (in German).]Search in Google Scholar
[Nobis M., Klichowska E., Terlevića A., Wróbel A., Erst A., Hrivnák R., Ebel A. L., Tikhomirov V. N., Byalt V. V., Gudkova P. D, Király G., Kipriyanova L. M., Olonova M., Piwowarczyk R., Pliszko A., Rosadziński S., Seregin L. P., Honcharenko V., Marciniuk J., Marciniuk P., Oklejewicz K., Wolanin M., Batlai O., Bubíková K., Choi H.-J., Dzhus M. A., Kochjarová J., Molnár A. V., Nobis A., Nowak A., Oťaheľová H., Óvári M., Shimko I. I., Shukherdorj B., Sramkó G., Troshkina V. I., Verkhozina A. V., Wang W., Xiang K. & Zykova E. V. 2018. Contribution to the flora of Asian and European countries: new national and regional vascular plant records, 8. Botany Letters 165(2): 200-222, DOI: 10.1080/23818107.2017.141581710.1080/23818107.2017.1415817]Search in Google Scholar
[Nürk N. M. & Blattner F. R. 2010. Cladistic analysis of morphological characters in Hypericum (Hypericaceae). Taxon 59: 1495-1507.10.1002/tax.595014]Search in Google Scholar
[Ohlendorf O. 1907. Beiträge zur Anatomie und Biologie der Fruchte und Samen einheimischer Wasser- und Sumpfpflanzen. Jahresbericht des Naturwissenschaftlichen Vereins zu Osnabrück 16: 34-137.]Search in Google Scholar
[Prince G. & Aniotsbehere J. C. 2012. Une espèce nouvelle de plante pour la Gironde et l’Aquitaine: Hypericum majus (A. Gray) Britton [A new species of plant for Gironde and Aquitaine: Hypericum majus (A. Gray) Britton]. Bulletin de la Société Linnéenne de Bordeaux 40(3): 301-304 (in French).]Search in Google Scholar
[Robson N. K. B. 1981. Studies in the genus Hypericum L. (Guttiferae) 2. Characters of the genus. Bull. Br. Mus. nat. Hist. (Bot.) 8(2): 55-226.]Search in Google Scholar
[Robson N. K. B. 1990. Studies in the genus Hypericum L. (Guttiferae) 8. Sections 29. Brathys (part 2) and 30. Trigynobrathys. Bull. Br. Mus. nat. Hist. (Bot.) 20(1): 1-151.]Search in Google Scholar
[Robson N. K. B. 2005. Hypericum L. In: T. G. Tutin, V. H. Heywood, N. A. Burges, D. M. Moore, D. H. Valentine, S. M. Walters, D. A. Webb(eds.). Flora Europaea, vol. 2 Rosaceae to Umbelliferae, 261-269 pp. Cambridge University Press, Cambridge.]Search in Google Scholar
[Stevens P. F 2007. Hypericaceae. In: K. Kubitzki (ed.). The Families and Genera of Vascular Plants, 9, pp. 194-201. Springer Verlag Berlin-Heidelberg.]Search in Google Scholar
[Szkudlarz P. 2014. Seed morphology and anatomy of Hypericum elegans Steph. ex Willd. Biodiv. Res. Conserv. 35: 15-18.10.2478/biorc-2014-0017]Search in Google Scholar
[Szkudlarz P., Celka Z. 2016. Morphological characters of the seed coat in selected species of the genus Hypericum L. and their taxonomic value Biodiv. Res. Conserv. 44: 1-9.10.1515/biorc-2016-0022]Search in Google Scholar
[Szabes L. A. & Morozova A. A. 1991. Clusiaceae. In: A. L. Takhtajan (ed.). Sravnitielnaya anatomiya semyan 3: 209-215. Sankt Petersburg.]Search in Google Scholar
[The Plant List2013. Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 31 July 2019).]Search in Google Scholar
[Zarzycki K., Trzcińska-Tacik H., Różański W., Szeląg Z., Wołek J. & Korzeniak U. 2002. Ecological indicator values of vascular plants of Poland. In: Z. Mirek (ed.). Biodiversity of Poland, 2, 183 pp. W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków.]Search in Google Scholar