Zephyranthes flavissima is an outstanding species from Brazil.  It has golden yellow flowers as shown in the attached picture.  Perfect for adding a splash of colour to any mass planting of white crocus.  These crocus bulbs are supplied fresh - they will have foliage and roots (not just your average dried bulb). It is vigorous and multiplies freely and often flowers a few days after watering.   The price is for 10 flowering size bulbs.