The Tulip bulbs distributed at the potluck are Gudoshniks. From the provider’s website:
“A remarkable tulip loved for its variegated blooms. The flowers vary from an almost plain creamy peach to a deep rose-red, with all possibilities in between. A wealth of colors that has to be seen to be believed. Gudoshnik means “artist” in Russian.”
Plant these 5″ deep with 5 per square foot maximum density. For more information:
http://www.colorblends.com/Wholesale-Flowerbulbs/Tulip-Bulbs/Gudoshnik#.WDyRpaIrI3F