Hibiscus trionum
(Flower of an Hour)

Other pictures of this plant:

               Seedpod                                           Leaf                                            Stem                                        Seed                                          Habit

Facts About this Plant:

This plant is introduced and is not native to the US.
    Common Names: Flower of an Hour, Bladder Hibiscus, Bladder Ketmia, Bladder Weed, Modesty, Puarangi, Shoofly, Venice Mallow
    Synonyms: Trionum trionum
    Lifespan: Annual
    Zones: n/a
    Type: Forb
    Bloom Time: May - September
    Status: Non-Native

Hibiscus trionum, or Flower of an Hour, is NOT NATIVE to the United States. It is now introduced to almost the entire US, where it grows often in yards and disturbed areas. It blooms in mid summer, with beautiful cream yellow flowers, but unfortunately, they only are open for a very short period of time, giving rise to the name "Flower of an Hour". The plant originates from Europe and produces many seeds, making it very likely to come back if it sets seed.

This non-native species is actually the most wide spread of any of the Hibiscus species in the US. Given its small stature and annual nature, and the very short length of its bloom time, it is easy to tell apart when in bloom. When not in bloom, its interesting leaves and large seed pods also set it apart.

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