Oenothera is a genus of about 145
species of herbaceous flowering plants native to the Americas. It is the type
genus of the family Onagraceae. Common names include evening primrose, suncups,
and sundrops. They are not closely related to the true primroses (genus
Primula). The sun-drop usually found in gardens is mistakenly called “evening
primrose” some Oenothera do bloom at night, but not thee. They resemble large,
spread open buttercups and bloom in early summer, with some repeat bloom as
summer goes on O. pilosella however sometimes labeled O. fruticosa is the weedy
variety gardeners tend to complain to plant if you want a lot of sunny yellow
in your garden and you want it quickly, O. missourensis has larger flowers,
grows low to the ground, and is not a spreader. Fyrverkeri is long blooming.
Moreover all sun loving and tolerant of dry, infertile soil and those that
enjoy your garden too much can easily be weeded out, for they are shallow
rooted. Try them in a spot where you want a lot of color quickly.
