Texas Vascular Plant Checklist:  Ophioglossaceae
The Adder's Tongue Family
(Polypodiophyta, Ophioglossopsid, Ophioglossidae)

 Botrychium
   biternatum (Sav.) Underwood (cutleaved grapefern)
   dissectum Spreng. (cut leaf grape fern)
   lunarioides (Michx.) Sw. (winter grape fern)
   virginianum (L.) Sw. (rattlesnake fern, virginia grapefern)

 Ophioglossum
   crotalophoroides var. crotalophoroide (heartleaf adder's tongue, bulbous adder's tongue)
   engelmannii Prantl (engelmann adder's tongue, limestone adder's tongue)
   nudicaule L. f. (fragile adder's tongue)
   petiolatum Hook. (long stem adder's tongue)
   polyphyllum A. Braun (large adder's tongue)
   vulgatum L. (southern adder's tongue)