. Catalogue of the Mesozoic plants in the Department of Geology, British Museum (Natural History) [Part I-II] The Wealden flora. Paleobotany; Paleobotany. 120 WEICHSBLIA. the frond is stiff and rigid; the axes of the pinnae are, like the main rachis, prominent and broad. Pinnules strong and rigid, inclined to the surface of the slab and to the axes of the pinnae. Venation clearly shown in some of the pinnules, those enlarged in the woodcut, Fig. 12. Towards the distal ends of the pinnae, the pinnules become shorter and approach a more triangular or deltoid form, which is, however, more cl
. Catalogue of the Mesozoic plants in the Department of Geology, British Museum (Natural History) [Part I-II] The Wealden flora. Paleobotany; Paleobotany. 120 WEICHSBLIA. the frond is stiff and rigid; the axes of the pinnae are, like the main rachis, prominent and broad. Pinnules strong and rigid, inclined to the surface of the slab and to the axes of the pinnae. Venation clearly shown in some of the pinnules, those enlarged in the woodcut, Fig. 12. Towards the distal ends of the pinnae, the pinnules become shorter and approach a more triangular or deltoid form, which is, however, more clearly seen in other specimens. Compare the figures of fronds by Stiehler, Trautschold, Hosius and von der Marck, etc. A somewhat similar habit is seen in Saporta's figure of Sclero- pteris Pomelii,^ but the two species are probably in no sense related. Sussex. Beehles Fio. 12 (V. 2630). YmmHieaoiWeichseUaMantenilfiTon^.). Enlarged 4 times. V. 2630fi. Part of a frond showing a wide rachis with pinnae. Sussex. Beckles Coll. V. 2173. Kg. 13. Portions of young pinnae, or terminal pieces of older pinnae showing smaller pinnules about 2-5 mm. in length, and of a different shape to the full-sized segments. Cf. Stiehler, PalsBontographica vol. v. pi. xiii. figs. 2ah; also a fragment figured by ITathorst in his "Beitrage zur mesozoisohen Flora Fi8. 13 (V. 2173). Pinnules of Weichselia Mmtelli (Brong.). Twice nat. size. Japans," pi. iv. fig. 3, which he describes as possibly part of a fertile pinna of Pecopteris Geyleriana {= Cladqphlebia Bunkeri), but he recognizes at the same time a resemblance to Weichselia. ' Pal. Fran9. vol. iv. p. 423, pi. 285, fig. 7, and pi. 286, fig. 2 and figs. 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 British Museum (Natural History). Dept. of Geology; Seward, A
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