Mirabilis nyctaginea (Wild Four O'Clock)

Animated Image of the Occurrences of Mirabilis nyctaginea over Time
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Although Mirabilis nyctaginea is native to the United States, its range did not originally include Massachusetts (Gleason and Croquist 1991).  This species, previously known by the name Oxybaphus nyctaginea, is now known every county in the state. Specimens collected from Jamaica Plain (Suffolk County) in the Summer of 1998 had purple flowers, while populations in the Midwestern United States appear to frequently have white or yellowish flowers.  This plant is not an aggressive invader, and is thus not yet considered to be a threat to endemic plants.
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