Species

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Total: 1285

species valid

Archaeopteris browniana (Dawson in C.H. Hitchc.) Lesq. Sec. Geol. Surv. Pennsylvania Rept. Progr., 1884, P(3): 837, 850. 25 Oct 1884

species valid

Arisaema cretaceum Lesq. Monogr. U.S. Geol. Surv., 1891, 17: 37. Oct 1892

species valid

Aristolochia curvata Lesq. Amer. J. Sci. Arts, Series 2, 32(96): 359. Nov 1861

species unavailable

Aristolochia dentata (Heer in Capellini, Heer) Lesq. Rept. U.S. Geol. Surv. Territ., 1883, 8: 59. Jan 1885

species valid

Aristolochia obscura Lesq. Amer. J. Sci. Arts, Series 2, 32(96): 359. Nov 1861

species valid

Aristolochites infundibuliformis Lesq. Bull. U.S. Geol. Geogr. Surv. Territ., Series 2, 1(5): 393. 8 Jan 1876

species valid

Arundo cretacea Lesq. Amer. J. Sci. Arts, Series 2, 46(136): 92. Jul 1868

species valid

Arundo obtusa Lesq. Bull. U.S. Geol. Geogr. Surv. Territ., Series 2, 1(5): 385. 8 Jan 1876

species valid

Arundo reperta Lesq. Bull. U.S. Geol. Geogr. Surv. Territ., Series 2, 1(5): 384. 8 Jan 1876

species valid

Asimina eocenica Lesq. Rep. (Annual) U.S. Geol. Surv. Territ., 6: 387. 1873

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