Rare and Vulnerable Plant Species of Oklahoma

The US Fish and Wildlife Service maintains a list of plants and animals native to the United States that may warrant future listing as species vulnerable to extinction. Species considered sensitive are candidates for listing as threatened or endangered under the Endangered Species Act. However, despite their rarity, insufficient information exists regarding population stability of and threat(s) to these species.

If you are aware of populations of the species listed below, please contacting us.

Wildflowers
Ouachita Indigobush (Amorpha ouachitensis)
Wheel Milkweed (Asclepias uncialis)
Southern Lady's Slipper (Cypripedium kentuckiense)
Gulf Pipewort (Eriocaulon koernickianum)
Twistflower or Goodman Pineoak Jewelflower (Streptanthus
squamiformis)
Arkansas Meadow-Rue (Thalictrum arkansanum)
Earleaf Foxglove (Agalinis auriculata)
Skinners Foxglove (Agalinis skinneriana)
Ozark Spiderwort (Tradescantia ozarkana)
Ozark Wake Robin (Trillium pusillum var. ozarkanum)

Grasses
Cumberland Sandreed (Calamovilfa arcuata)

Sedges
Hammock Sedge (Carex fissa)
Tissue Sedge (Carex hyalina)
Waterfall's Sedge (Carex latebracteata)

Trees
Ozark Chinquapin (Castanea pumila var. ozarkensis)