@Tapirlord I have never made the effort to look into the genus beyond a quick glance at the key which suggests they may as well be impossible to distinguish without the plants in hand. I treat each species the same as they are all exotic annuals and likely function the same way in the environments in which they are found.
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2,203,459 sightings of 20,917 species in 9,213 locations from 12,749 contributors
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