Species

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Total: 712

species valid

Osmunda sepulta (Newb.) Knowlt. Profess. Pap. U.S. Geol. Surv., 131(F): 150. 30 Mar 1923

species valid

Palaeopotamogeton florissanti Knowlt. Proc. U.S. Natl. Mus., 51(2151): 251. 24 Nov 1916

species valid

Paleonelumbo macroloba Knowlt. Profess. Pap. U.S. Geol. Surv., (155): 93. 19 Jun 1930

species valid

Paliurus minimus Knowlt. Monogr. U.S. Geol. Surv., 32(2): 659. Oct 1899

species valid

Palmocarpon palmarum (Lesq.) Knowlt. Bull. U.S. Geol. Surv., (152): 158. Oct 1898

species valid

Palmoxylon cellulosum Knowlt. Proc. U.S. Natl. Mus., 11(6-7): 90. 8 Nov 1888

species unavailable

Paloreodoxites plicatus (Lesq.) Knowlt. Profess. Pap. U.S. Geol. Surv., (155): 41. 19 Jun 1930

species valid

Parthenocissus tertiaria (Lesq.) Knowlt. Profess. Pap. U.S. Geol. Surv., 131(F): 170. 30 Mar 1923

species valid

Persoonia lesquereuxii Knowlt. in Lesq. Monogr. U.S. Geol. Surv., 1891, 17: 89. Oct 1892

species valid

Phaseolites coloradensis Knowlt. Profess. Pap. U.S. Geol. Surv., (155): 97. 19 Jun 1930

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