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sphenopteris
sphenopteris n.
Brit. 
/sfᵻˈnɒpt(ə)rɪs/
, /sfᵻˈnɒpt(ə)rɪs/U.S. /sfiˈnɑptərəs/
/sfiˈnɑptərəs/ΘΚΠ
the world > plants > particular plants > ferns > [noun] > fossil ferns
sphenopteris1837
wedge-leaf fern1851
wedge-fern1867
glossopteris1883
Medullosa1885
medullosan1920
1837 Penny Cycl. VII. 292/2 Sphenopteris has twice or thrice pinnatifid leaves.
1842 Penny Cycl. XXII. 338/2 Sphenopteris, a genus of fossil ferns... They are all coal-measure plants.
1851 G. A. Mantell Petrifactions i. §2. 32 The other characteristic Wealden plant is the Sphenopteris (S. Mantelli), or wedge-leaf fern.
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