Checklist » Nyctaginaceae » Mirabilis nyctaginea
Last updated 3/16/2010 by David Giblin.
Mirabilis nyctaginea (Michx.) MacMill.[FNA4, HC, HC2]
four-o'clock, heartleaf umbrellawort four-o'clock

Publication: Metasp. Minnesota Valley. 217. 1892 (as nyctagineus).

Origin: Introduced from east of the Rocky Mountains

selected vouchers: Not at WTU; WS?

Notes: Reported by Richard Old, and considered a noxious weed in WA.

FNA4: "Mirabilis nyctaginea is considered a noxious weed in some states. The holotype of Mirabilis ×collina Shinners is a hybrid between M. nyctaginea and M. albida. On the Great Plains, M. nyctaginea also appears to intergrade with M. albida. Prominence of the tubercles and redness of the fruits decreases in western populations. Near the Great Lakes, comparatively narrow-leaved plants with sparsely hirsute stems seem to be intergrades between M. nyctaginea and more or less hirsute M. albida. Mirabilis ×serotina Shinners is a hybrid between M. nyctaginea and M. glabra."

References:

» Le Duc, A. 1995. A revision of Mirabilis section Mirabilis (Nyctaginaceae). Sida 16: 613-648.
» Pilz, G. E. 1978. Systematics of Mirabilis subgenus Quamoclidion (Nyctaginaceae). Madroño 25: 113-132.
Synonyms & Misapplied Names:
Allonia nyctaginea Michx.
Oxybaphus nyctagineus (Michx.) Sweet