The first pix has two large plants of L. parryi at upper left, as well as scattered throughout the rest of the pix, with at least ten total plants, including very young plants with a single leaf. At lower right in that pix, the largest young plant is Veratrum californicum, with wider leaves with obvious veins, and with no visible stem. The larger lemon lilies all have a visible darkish stem with no leaves almost most of its lowermost portion.