Bladdernut
(Staphylea trifolia)

Other common names: American Bladdernut
French names: Staphylier à trois folioles
Family: Bladdernut Family (Staphyleaceae)
Distinctive features: Shrub, ;The "bladders", which are the fruits. 3-part opposite compound leaves.
Similar species:
  •   Hop Tree (Ptelea trifoliata) - leaflets are stalked.
  •   Poison Ivy (Toxicodendron radicans) - has alternate leaves.
Flowers: Spring, Summer;  Yellow;  5 parts (petals)
Leaves: Opposite/Whorled;  Compound/Divided;  Toothed;  Opposite, compound (3 leaflets).
Height: Up to about 5m
Trunk: Striped.
Fruit/Seeds: Ususual "bladders" contain the seeds.
Habitat: Rocky woods, river banks
Books: Shrubs of Ontario: 295    Newcombe's Wildflower Guide: 318   
Native/Non-native: Native
Status: common
For more information visit: Ontario Wildflowers

This is the unusual fruit that gives this plant its name. The papery "bladder" contains 1-4 pale brown hard seeds. They come loose later in the fall when ripe and rattle around inside.

A string of bladders along a branch.

A bladder left over from the previous year. Spring flowers of this plant are visible in the background.

Spring flowers (early June).

The compound leaf (opposite pattern along the stems).

The trunk of this shrub has a striped pattern to it.

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