| 单词 | θ23675 |
| 释义 | the world > plants > particular plants > ferns > [noun] > fossil ferns (6) sphenopteris1837 wedge-leaf fern1851 = wedge-fern n. wedge-fern1867 a fossil fern of the genus Sphenopteris. glossopteris1883 A fossil fern belonging to the genus so named. Also attributive. Medullosa1885 A genus (or form genus) of fossil plant stem found in Carboniferous and Permian deposits; the extinct seed-bearing tree fern (pteridosperm) from… medullosan1920 A seed-bearing fern of the extinct genus Medullosa or the group to which it belongs. |
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