I now have a keen eye for seedlings. My rule of thumb for weeding, is "if I don't know what it is, then don't pull it". I recognized the seedling in the middle as an orange-flowered native, Dogweed (Dyssodia speciosa) and have transplanted it to a more desireable location. The blue-leafed groundcover is Sesuvium verrucosum, another native, that has become a favorite. It has nice pink flowers year round. Now, when I'm cruising through the garden, I'm also looking for interesting seedlings.