Affiliation:
1. Department of Plant Taxonomy, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614 Poznań , Poland
Abstract
Abstract
Eight Hypericum species are native to Poland: H. elegans Stephan ex Willd., H. hirsutum L., H. humifusum L., H. maculatum Crantz, H. montanum L., H. perforatum L., H. pulchrum L., and H. tetrapterum Fr. Only seeds of H. elegans were investigated in detail in Poland before, so here we present results of qualitative and quantitative analyses of seed morphology of the other 7 species, based on characters like seed length, width, and shape, seed coat sculpture, shape of epidermal cells of the testa, and number of epidermal cells along the seed axis. The results show that seeds of the studied species are small, 0.56-1.15 mm long and 0.26-0.49 mm wide. In SEM images, seed coat sculpture is reticulate in 5 species, papillate in H. hirsutum, and cup-shaped in H. pulchrum. The differences are caused by the varied final development of the testa epidermis, which constitutes the outer layer of the seed coat. The mean number of epidermal cells along the seed axis ranges from 22 to 33. Results of cluster analysis, based on the agglomeration method and including also published data on seeds of H. elegans, show that the variation in the investigated characters of seeds is reflected in the taxonomic division of the genus into sections.
Reference19 articles.
1. 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
2. Bojňanský V. & Fargašová A. 2007. Atlas of seeds and fruits of Central and East European Flora. The Carpatian Mountains Region. 1025 pp. Springer, Dordrecht.
3. 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.
4. Hagema n I. 1987. On subspecific taxa of Hypericum empetrifolium (Hypericaceae) from Crete. Pl. Syst. Evol. 155: 165-187.
5. Kaźmierczakowa R., Bloch-Orłowska J., Celka Z., Cwener A., Dajdok Z., Michalska-Hejeduk D., Pawlikowski P., Szczęśniak E. & Ziarnek K. 2016. Polish red list of pteridophytes and flowering plants. 44 pp. Instytut Ochrony Przyrody PAN, Kraków.
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