Species

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Total: 712

species valid

Dryophyllum longipetiolatum Knowlt. Monogr. U.S. Geol. Surv., 32(2): 710. Oct 1899

species valid

Dryopteris angustipinnata (Fontaine) Knowlt. Bull. U.S. Geol. Surv., (152): 91. Oct 1898

species unavailable

Dryopteris arguta (Lesq. in Hayden) Knowlt. Bull. U.S. Geol. Surv., (152): 91. Oct 1898

species valid

Dryopteris civica (Dawson) Knowlt. Bull. U.S. Geol. Surv., 1919, (696): 247. 13 Feb 1920

species valid

Dryopteris cladophleboides Knowlt. Prof. Paper USGS 101: 284, pl. 54, fig. 1. 1918.

species valid

Dryopteris coloradensis Knowlt. Profess. Pap. U.S. Geol. Surv., 108(F): 83. 22 Aug 1917

species valid

Dryopteris cystopteroides (Fontaine) Knowlt. Bull. U.S. Geol. Surv., (152): 91. Oct 1898

species valid

Dryopteris dentata Knowlt. Bull. U.S. Geol. Surv., (152): 91. Oct 1898

species valid

Dryopteris elliptica (Fontaine) Knowlt. Bull. U.S. Geol. Surv., (152): 92. Oct 1898

species valid

Dryopteris fredericksburgensis (Fontaine) Knowlt. Bull. U.S. Geol. Surv., (152): 92. Oct 1898

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