<abstract xmlns="http://www.w3.org/1999/xhtml"><p><italic>Hypericum majus</italic> (A. Gray) Britton is an alien species for Europe. It originates from North America and, in recent years, has been spreading in Europe. Presently, this species is found in Germany, France, Italy, Bosnia and Herzegovina, and Belarus. In Poland, it was noted for the first time in 2017 in western part of the country. Thus far, no detailed morphology and anatomy of <italic>H. majus</italic> seeds based on light and electron microscopy studies has been presented. Considering the fact that seeds provide important taxonomical information and the discussed species has not been investigated in this respect, in this research, an attempt was made to broaden the present knowledge.</p><p>Investigations were conducted based on samples originating from three localities in Central Europe (Poland). The obtained results showed that <italic>H. majus</italic> seeds are very small – about 0.5 mm in length. In the SEM image, their surface is reticulate, typical of majority of species in this genus. Anatomical analysis showed that seed coat of matured seeds is very delicate, composed of two cell layers with strongly lignified walls.</p></abstract>

Hypericum majus (A. Gray) Britton is an alien species for Europe. It originates from North America and, in recent years, has been spreading in Europe. Presently, this species is found in Germany, France, Italy, Bosnia and Herzegovina, and Belarus. In Poland, it was noted for the first time in 2017 in western part of the country. Thus far, no detailed morphology and anatomy of H. majus seeds based on light and electron microscopy studies has been presented. Considering the fact that seeds provide important taxonomical information and the discussed species has not been investigated in this respect, in this research, an attempt was made to broaden the present knowledge.Investigations were conducted based on samples originating from three localities in Central Europe (Poland). The obtained results showed that H. majus seeds are very small – about 0.5 mm in length. In the SEM image, their surface is reticulate, typical of majority of species in this genus. Anatomical analysis showed that seed coat of matured seeds is very delicate, composed of two cell layers with strongly lignified walls.

Seed morphology and anatomy of <italic>Hypericum majus</italic> (A. Gray) Britton

Department of Plant Taxonomy, Faculty of Biology

Department of General Botany, Faculty of Biology

Biodiversity Research and Conservation

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Seed morphology and anatomy of  (A. Gray) Britton

Hypericum majus (A. Gray) Britton is an alien species for Europe. It originates from North America and, in recent years, has been spreading in Europe....

Seed morphology and anatomy of Hypericum majus (A. Gray) Britton

Publié en ligne: 17 févr. 2020

Pages: 7 - 14

Reçu: 19 juil. 2019

Accepté: 30 sept. 2019

DOI: https://doi.org/10.2478/biorc-2019-0013

Mots clés
carpology, greater Canada St. John’s-wort, Hypericaceae, Poland, seed sculpture, seed coat

© 2019 Piotr Szkudlarz et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Seed morphology and anatomy of Hypericum majus (A. Gray) Britton

Publié en ligne: 17 févr. 2020

Pages: 7 - 14

Reçu: 19 juil. 2019

Accepté: 30 sept. 2019

DOI: https://doi.org/10.2478/biorc-2019-0013

Mots cléscarpology, greater Canada St. John’s-wort, Hypericaceae, Poland, seed sculpture, seed coat

© 2019 Piotr Szkudlarz et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
carpology, greater Canada St. John’s-wort, Hypericaceae, Poland, seed sculpture, seed coat