This dwarf crested iris (Iris Cristata) is in a patch of plants growing on the western edge of the steam just outside the quarry fencing (alongside the trail shown as dotted on our trail map) . I have found two patches of irises along this stream bank. The flowers are beautiful – but in 2018 each individual flower only lasted a few days. So, if you want to see them you will have to wait until next April and visit the park at least once a week. (The bank of this stream is precipitous and collapsing in places. So, only venture onto the dotted trail if you are sure footed and not wearing flip-flops.)