Catalpa speciosa and Impatiens tinctoria

Catalpa speciosa

Two beautiful, orchid like flowers can be found next to each other by the Nuffield Building.
The first of these is on the Indian Bean Tree, Catalpa speciosa, beautifully fragrant, white frilled flowers with a purple speckled and yellow blotched throat.
The second is on the perennial plant, Impatiens tinctoria, growing 6 feet tall with sweet scented, large white flowers with a red streaked throat.  

Impatiens tinctoria