Threatened and endangered plants in NH. I guess if it's not on this list then you can pick it.
On the list:
fairy slipper
greater yellow lady's slipper
lesser yellow lady's slipper
ram's head lady's slipper
showy lady's slipper
Not on the list Queens Anns Lace, Blackeyed Suzans
http://plants.usda.gov/java/threat?t...45&submit.y=13