Triteleia lilacina, commonly known as lilac prettyface, lilac-flowered wild hyacinth, or foothill triteleia, is endemic to "dry rocky outcrops, volcanic hills and mesas" of northern California. These photographs, taken two years ago minus a couple of days, were two of many taken that morning while I enjoyed an excellent wildflower display. The first image is full-frame, while the second is cropped significantly in order to show the tiny glass-like beads (hyaline vesicles) that line the inside of the flower. I don't think I noticed these when taking the photographs, so if I ever return to the area when these are in bloom, I'll be photographing them again. As long as it is a windless day, I would attempt both a supermacro shot of the vesicles, as well as a series of images taken at different focal points to be merged later in software.
Additional photographs are available via Calphotos (Triteleia lilacina, though images of the intriguing corms are lacking. Fortunately, these are available via the Theodore Payne Foundation wiki: the corms of Triteleia lilacina.