Reynwater is correct. The actual name is Calochortus aureus Here's a picture from Arizona: http://picasaweb.google.com/navbo123/AGalleryOfCalochortusSpeciesAndNaturalHybrids#5213227013180058178 There are several types of calochortus as pictured: http://picasaweb.google.com/navbo123/AGalleryOfCalochortusSpeciesAndNaturalHybrids# They are natives to California and parts of the Southwest.
i like the colors, we are doing Baja blue (a sprint greater turquoise) dresses and orange flora. Blue and yellow/orange are super summer time colorations, very complimentary, good decision! good luck!