. Fossil plants : for students of botany and geology . Paleobotany. XXVIl] SPHENOPTERIS 529 Cladophlebis lobifolia (Phill.) is a case in point ^. In this fern, which some authors speak of, without sufficient reason, as Dicksonia lobifolia^, the lowest pinnule is large and different in shape from the Fio. 352. A. Sphenopteris ohtusiloha. Pinnule. (Enlarged. After Zeiller.) B, C. S. ohtusiloha. (^ nat. size. After Zeiller.) D. Pecopteris arhorescens. (Slightly enlarged. After Zeiller.) E. Sphenopteris furcata { = Diplotmema furcatum). (Slightly en- larged. After Zeilfer.) Sphenopteris.
. Fossil plants : for students of botany and geology . Paleobotany. XXVIl] SPHENOPTERIS 529 Cladophlebis lobifolia (Phill.) is a case in point ^. In this fern, which some authors speak of, without sufficient reason, as Dicksonia lobifolia^, the lowest pinnule is large and different in shape from the Fio. 352. A. Sphenopteris ohtusiloha. Pinnule. (Enlarged. After Zeiller.) B, C. S. ohtusiloha. (^ nat. size. After Zeiller.) D. Pecopteris arhorescens. (Slightly enlarged. After Zeiller.) E. Sphenopteris furcata { = Diplotmema furcatum). (Slightly en- larged. After Zeilfer.) Sphenopteris. Sphenopteris is one of the many generic names which we owe to Brongniart^. It is the generic designation used for a great number of Palaeozoic and later fronds, most of which are those of true ferns while some Palaeozoic species are undoubted Pteridosperms. The genus, which is purely provisional, includes •1 I6id. p. 145. ^ Eaciborski (94) A. PI. xi. 3 Brongniart (22) Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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