Yellow Flowers, Part 3

Well after all that, those yellow flowers I've been rambling on about bear the rather unbecoming name of Bladderpod. The scientific name is Isomeris arborea. They are particularly Californian, and do not occur elsewhere. The Califlora page has a thorough write-up, and yet more pictures. The Las Pilitas Nursery site also has some interesting observations, even mentioning that the plant is found near Tehachapi.