Coefficient of Conservatism:
Coefficient of Wetness:
A shrub from southern Europe, occasionally grown for its large yellow flowers, followed by large inflated bladder-like fruits, very sparingly escaped into dry thickets and weedy banks.
Collected spreading near the top of a west facing, open bluff below a cemetery in Washtenaw Co. by J. N. Kelly in 1987. Also known from adjacent Ontario and Ohio. A earlier collection from Muskegon Co. is without notation of whether wild or planted, and is not mapped, as also a more clearly cultivated Farwell collection from a cemetery in Houghton Co., in 1936.
A distinctive bushy shrub, often with numerous upright branches, to 3 m tall with pinnate leaves, rather like Robinia, but with the leaflet apex strongly emarginate with a tiny apiculus. The bladdery fruits are much larger and more conspicuous than the flowers.