. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. Fossil Floras of Cape Colony. 19 Sphenopteris sp. Text-figure The fragment (231c) represented in text-fig. 1 (b) is part of the terminal portion of a pinna, 2 cm. long, bearing pinnules with well- defined acutely spreading and forked veins of the Sphenopteris type (a). It bears a close resemblance to the type of frond illus- trated by the widely distributed Jurassic species Coniopteris hymenophylloides (Brongn.); but without more evidence it is ad- visable to leave the fragment as Sphenopteris sp.
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. Fossil Floras of Cape Colony. 19 Sphenopteris sp. Text-figure The fragment (231c) represented in text-fig. 1 (b) is part of the terminal portion of a pinna, 2 cm. long, bearing pinnules with well- defined acutely spreading and forked veins of the Sphenopteris type (a). It bears a close resemblance to the type of frond illus- trated by the widely distributed Jurassic species Coniopteris hymenophylloides (Brongn.); but without more evidence it is ad- visable to leave the fragment as Sphenopteris sp. Other specimens : 234c, 238c. Genus Brongniart. sp. [cf. ARCTiCA (Heer).] Plate II., figs. 5, 5a. The fragments of simple Tcenioptcris fronds are too imperfect to admit of a satisfactory diagnosis on which to found a species. The fronds possess a broad midrib from which lateral veins are given off' at right angles or at an angle slightly less than 90°; these may pass to the margin as simple veins or bifurcate either close to their exit from the midrib or in different positions in the lamina. The leaf is usually about 1*5 cm. in breadth and there appear to be approximately 10 veins per 5 mm. No specimens have been found showing either the base or apex of the lamina, and there is no indication of any sporangia. The abundance of Tcenioptcris in Jurassic and Wealden strata and the close agreement, often amounting to identity, between forms referred to distinct species renders it inadvisable to apply a distinctive name to the Uitenhage fragments. A comparison may be made with the. 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 South African Museum; South African Museum. Annale van die Suid-Afrikaanse Museum. Cape Town [etc. , South African Museum, etc. ]
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Keywords: ., booka, bookcentury1900, bookdecade1900, booksubjectnaturalhistory
