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1 Tepals broadly ovate, the petals only slightly shorter than the sepals; fruit almost unlobed (the individual carpels flattish apically); [native, of ponded and tidal wetlands]
1 Tepals oblong to linear-oblong, the petals much shorter than the sepals; fruit lobed (each of the individual carpels forming a projecting lobe or bump on the aggregate fruit); [exotic, generally of disturbed uplands]