Dr. Tom D. Throckmorton
d 2000. Des Moines, Iowa, USA. Creator of the daffodil colour-coding system introduced in 1975
Perianth segments golden fawn, with shiny yellow overtones, of thick substance; corona bright yellow, with olive green at base and orange with flecks of gold and white at rim.
Jumping-Jack, 2 Y-GYO, Dr. Tom D. Throckmorton, United States, 1976Photo #6081 Dr. Tom D. Throckmorton, USA