Hippeastrum 'Ambiance'
Quickly now, do you know another common name for Amaryllis also known as Hippeastrum?
Did you just answer Knight's Star Lily?
Correct! How did you know that?
I didn't know it until I began reading through Dreer's Hints on the Growing of Bulbs, published by Henry A. Dreer, Incorporated, Seeds, Plants and Bulbs, 714-716 Chestnut Street, Philadelphia, copyright 1914.