If you receive a packet of seeds from unknown origins, do not plant them. Many packages seemingly from Chinese sources have found their way to at least 27 states in what the US Department of Agriculture has deemed a “brushing scam." Brushing scams occur when cheap items are sent unsolicited to increase the company's output in the hopes of improving ratings and search engine optimization.  Although it did not seem as if these packets contained any harmful seeds, it would be wise to avoid planting any unknown seeds, as they might be invasive specifies or there may be plant pathogens or insects inside the seed.