Sphenophyllum

Sphenophyllum is a genus in the order Sphenophyllales. It has been placed in the family Sphenophyllaceae.

Species
Species that have been described include:
 * †Sphenophyllum angustifolium
 * †Sphenophyllum biarmicum Zalessky (1937)
 * †Sphenophyllum changxingense
 * †Sphenophyllum churulianum Ashw. K. Srivast. & Rigby (1963)
 * †Sphenophyllum costae
 * †Sphenophyllum crenulatum Ashw. K. Srivast. & Rigby (1963)
 * †Sphenophyllum cuneifolium (Sternb.) Zeiller (1878)
 * †Sphenophyllum elongatum Rassk. (1961)
 * †Sphenophyllum emarginatum Brongn. (1822) (type species)
 * †Sphenophyllum fanwanense
 * †Sphenophyllum gilmorei C.D. White (1929)
 * †Sphenophyllum gondwanensis
 * †Sphenophyllum guangzhuoense, nomen nudum
 * †Sphenophyllum koboense
 * †Sphenophyllum latifolium Fontaine & I.C. White (1880)
 * †Sphenophyllum longifolium (Germar) Gutbier (1843)
 * †Sphenophyllum lungtanense
 * †Sphenophyllum majus Bronn (1834)
 * †Sphenophyllum miravallis Vetter
 * †Sphenophyllum oblongifolium (Germar) Unger (1850)
 * †Sphenophyllum paranaense O. Rösler & Rohn (1984)
 * †Sphenophyllum pseudotenerrimum Sze (1936)
 * †Sphenophyllum radiatum Unger (1850)
 * †Sphenophyllum rhodesii
 * †Sphenophyllum rotundatum T. Halle (1927)
 * †Sphenophyllum schlotheimii Brongn. (1828)
 * †Sphenophyllum sino-coreanum H. Yabe (1922)
 * †Sphenophyllum stoukenbergi Schmalh. (1887)
 * †Sphenophyllum subtenerrimum Nath. (1902)
 * †Sphenophyllum tenuifolium Fontaine & I.C. White (1880)
 * †Sphenophyllum thonii Mahr (1868)
 * †Sphenophyllum utkalensis
 * †Sphenophyllum verticillatum
 * †Sphenophyllum zwickaviense