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| Keywords: The Quarterly journal of the Geological Society of London (12893785694).jpg 24 ME A C SEWAKD ON CTCADEOIDEA GXGANTEA Feb 1 897 - <br> Passing to the apex of the trunk we find that the leaf-bases become <br> smaller in size PI II fig 1 and finally at the extreme tip there is a <br> conical bud surrounded by several long and narrow bud-scales fig 3 <br> Covering the apex of the bud there is an irregularly-shaped cap of <br> whitish colour of which the surface is marked by numerous wavy <br> lines suggestive of fine scaly or hair-like structures The bud has <br> a height of about 3 or 4 cm and the scale-leaves which are best seen <br> are about 1 5 cm long and 6 mm broad The appearance of this <br> terminal bud is shown in PI I and more clearly in PI II fig 1 <br> and in fig 3 The lighter-coloured cap gives a flat-topped appear- <br> ing 3 ” Apical bud of Cycadeoidea gigantea sp nov <br> V\ <br> ance to the bud and hides the tips of the uppermost scale-leaves ; <br> the form of the scales is however clearly seen in the lower portion <br> of the bud It is important to note that the stem at the base of <br> the bud is almost circular in outline thus confirming the opinion <br> that the flattened appearance shown in fig 2 p 23 is in great <br> measure due to crushing In the neighbourhood of the stem-apex <br> the surface-features are imperfectly preserved but the leaf-bases are <br> distinctly visible in many places and their gradual increase in size <br> as we pass down the stem is easily recognized <br> The material of which the specimen consists is highly siliceous ; <br> as shown in fig 2 the central portion exhibits no trace of plant- <br> structure and is composed of cherty rock while at the periphery <br> the basal portion of the petioles and the interpetiolar substance are <br> more or less clearly seen and are represented in the sketch by <br> radial lines extending inward a short distance 4 to 5 cm from the <br> surface There are no traces on the stem of any large lateral buds <br> such as form so striking a feature in some fossil Cycadean plants <br> as for example in Bennettites Gibsonianns Carr and in some of <br> the large specimens from North America and Italy 1 An example <br> figured by McBride 2 from Dakota shows a number of lateral shoots <br> 1 Capellini Solras-Laubach ' Tronchi di Bennettitee ' Mem Eeal Accad <br> Sci Istit Bologna 5 vol ii 1892 p 3 <br> 2 ' The American Geologist ' vol xii 1893 p 248 pi xi 36028729 111130 51125 Page 24 Text 53 http //www biodiversitylibrary org/page/36028729 1897 Geological Society of London NameFound Bennettites NameConfirmed Bennettites NameBankID 4900580 NameFound Cycadeoidea gigantea Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 53 1897 Geology Periodicals Smithsonian Libraries bhl page 36028729 dc identifier http //biodiversitylibrary org/page/36028729 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-03 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12893785694 2015-08-26 17 55 56 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1897 Photos uploaded from Flickr by Fæ using a script | ||||
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