Ex. 1. When Montia parvifolia (DC.) Greene is treated as comprising two subspecies, one must write
M. parvifolia subsp. parvifolia for that part of the species that includes the nomenclatural type and excludes the type of the name of the other subspecies,
M. parvifolia subsp. flagellaris (Bong.) Ferris. The name M. parvifolia applies to the species in its entirety.
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