Definition
Genus Onopordon is simply a less common spelling variation of genus Onopordum. They both refer to the same grouping of prickly thistle plants. Think of it like using 'grey' versus 'gray'βsame meaning, different spelling.πΏ While genus Onopordum is the generally accepted form in scientific literature, you might see genus Onopordon in older texts. Consider it a historical or regional variation. The plant itself is still the same hardy, striking thistle.