These lines can even have different chromosome numbers (or ploidy levels), making them less compatible with other plants even when cross-pollination does occur. A full list of synonyms, subspecies and varieties is given in the Brassicaceae Species Checklist. The account here is for Draba verna L. in its original, aggregate, sense, although D. praecox and D. majuscula can be viewed as separate species.
These lines can have varying chromosome numbers (or ploidy levels), making them less compatible with other plants even when cross-pollination occurs. A comprehensive list of synonyms, subspecies, and varieties is provided in the Brassicaceae Species Checklist. This account covers Draba verna L., but D. praecox and D. majuscula might be considered separate species.