Day lilies are edible? Really?

I just ran across an interesting tidbit over at the Wise Woman herbal e-zine (Susun Weed): Day Lilies are edible!  Apparently all lilies that face up are edible. Here's the blurb below, and for more you can hit the original.

Day lily (Hemerocallis fulva)
This showy roadside weed is one of the first edible weeds I put in my salad. There is no mistaking the bright orange flowers! (All upward-facing lilies are safe to eat, no matter what their color. Lilies that face out or down are not safe to eat.) In China, day lilies are dried and added to soups and other foods. Euell Gibbons dipped the flowers in batter and fried them. The blossoms, harvested early in the morning, just before they open, are considered a specific remedy for women with a genetic disposition toward breast cancer.