*2.1. Honey and Plant Material*

Ten samples of honeys declared as goldenrod were purchased in the 2021 beekeeping season from apiaries located in the Podkarpackie Province (Poland).

The flowers of three species of goldenrod (*Solidago virgaurea, Solidago gigantea* and *Solidago canadensis)* were collected from natural habitats in August 2021 (50◦045 N 21◦862 E; 50◦048 N 21◦869 E; 50◦039 N 21◦894 E). After botanical identification, the samples were dried in the dark, at a temperature not exceeding 40 ◦C. Voucher specimens were deposited in Department collection under the numbers SV/08/21, SG/08/21, and SC/08/21.
