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Total: 22

species valid

Osmundacaulis nerii Tidwell, Ross Jones Palaeontographica, Abt. B, Paläophytol., (1-6): 182. 22 Apr 1987

species valid

Palaeopiceoxylon thinosum Tidwell, Thayn S. W. Naturalist, 30(4): 525. 27 Nov 1985

species unavailable

Palaeopiceoxylon thomsonii (Bannan, Fry) Tidwell, Thayn S. W. Naturalist, 30(4): 529. 27 Nov 1985

species valid

Palmoxylon gustavesonii Tidwell, Medlyn, Thayn Great Basin Naturalist, 32(1): 11. 31 Mar 1972

species valid

Palmoxylon pristina Tidwell in Tidwell, S.R. Rushforth, Reveal, Behunin Science, 168(3933): 837. 15 May 1970

species valid

Palmoxylon simperi Tidwell in Tidwell, S.R. Rushforth, Reveal, Behunin Science, 168(3933): 837. 15 May 1970

species valid

Paraphyllanthoxylon utahense Thayn, Tidwell, W.L. Stokes Great Basin Naturalist, 43(3): 396. 31 Jul 1983

species valid

Rhizopalmoxylon behuninii Tidwell, Medlyn, Thayn Great Basin Naturalist, 32(1): 4. 31 Mar 1972

species valid

Rhizopalmoxylon blackii Tidwell, Medlyn, Thayn Great Basin Naturalist, 32(1): 7. 31 Mar 1972

species valid

Rhizopalmoxylon scottii Tidwell, Medlyn, Thayn Great Basin Naturalist, 32(1): 8. 31 Mar 1972

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