]> [author note: ULM (= NLU; pre-Aug 1999); Flora of Louisiana; Ophioglossum] [collector note: Original collections(173,300): NLU; United States (mainly La.; also e.g. Ala., Ark., Miss., Mo., N.C., Okla. & Tenn.; often col. et al.): DPU (many col. et al.), UT (plants from La.)] Botany Thomas, Roy Dale Thomas, Roy Dale R. D. Thomas R. Dale Thomas Roy Dale Thomas Thomas, Roy Dale et alia 1936 2022