Texas Vascular Plant Checklist:  Isöetaceae
The Quillwort Family
(Lycopodiophyta, Isöetopsida, Isöetidae)

 Isöetes
   butleri Engelm. (limestone quillwort)
   lithophila N.E. Pfeiffer (rock quillwort)
   melanopoda Gay & Durieu ex Durieu (blackfoot quillwort)