I checked the catalog about Princeps, it just says bicolor, and does't say white or ivory, so it may just be referring to the varying shades of yellow.
The warm weather the last couple of days is bringing them on quickly. April is a grand month in Kentucky!
Pink Charm one of the first "pinks" to bloom here, and one of my favorites.
Fellow's Favorite, Las Vegas, Mary Gay Lirette
Fellow's Favorite and Las Vegas are in their 2nd year, from 5 bulbs of each. The number of blooms has doubled.