Narcissus x intermedius and N. x odorus in east Texas, 4 April 2010.
Above and below.  Large population mostly of Narcissus x intermedius, Gregg Co. In the lower photo, near the top left corner, a group of clumps of Narcissus x odorus is near the top of the slope. 
Top, right, and bottom.  Plants, flowers, and fruits of Narcissus x intermedius, Gregg Co.
Above.  Flower of Narcissus x odorus, Gregg Co.