. On the genus Lepidophloios [microform] : as illustrated by specimens from the coal formation of Nova Scotia and New Brunswick. Paleobotany; Paleobotany; Paléobotanique; Paléobotanique. ay thus Ihj e loaf-base, 0 former is r condition OS of Corda. will appear V) ,AR()KI>. fforded to me I described in re since been Iness of Prof iparently of a • flattened, its id with clay- rkings of the is scarcely an ire preserved, Y occupied by last is a ring Bsue, about a g to what has [UH J. w. DAWiON] ON THE GENUd LEP1D0PHL0I08 61 in similar stems been regarded as an equivalent of corky bark. This tis
. On the genus Lepidophloios [microform] : as illustrated by specimens from the coal formation of Nova Scotia and New Brunswick. Paleobotany; Paleobotany; Paléobotanique; Paléobotanique. ay thus Ihj e loaf-base, 0 former is r condition OS of Corda. will appear V) ,AR()KI>. fforded to me I described in re since been Iness of Prof iparently of a • flattened, its id with clay- rkings of the is scarcely an ire preserved, Y occupied by last is a ring Bsue, about a g to what has [UH J. w. DAWiON] ON THE GENUd LEP1D0PHL0I08 61 in similar stems been regarded as an equivalent of corky bark. This tissue is infiltrated with pyrite, so that it can be seen only as an opaque object, and is very imperfectly preserved. The outer bark and remains of the leaf-bases are in the state of dense shining coal. (Plato VI. and figures in the text.) The axis in cross-section shows u central space without structure, and with only obscure indications of transverse partitions of the Storn-. Fio. B.—Original Sections of Lepidophloios Acaoianus, I860. (1) Grosfl-section of Lepidophloios, showing (a) pith, (6) woody axis, (c) inner bark and leaf-bundles, <d) corky bark, (e) epidermis. (2) Part of cross-section more magnified, showing double ring of scalariform fibres and leaf-bundles. (3) Scalariform fibres still more enlarged. bergian type. Surrounding this is a double cylinder of scalariform vessels or fibres,' coarser within and finer without, but not showing any radiating arrangement or medullary rays. The outer margin of the cylinder presents a series of loops or notches, each showing the section of one of the bundles of vessels proceeding to the loaves, each of which seems to have been enclosed in a sheath, which has perished. They appear to have run vertically, parallel to the surface of the stem for a space be- fore diverging toward the surface. The cone-scars being placed at inter- vals of about 2^ inches vertically, are represented only occasionally on the slices by larger bun
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpaleobo, bookyear1898
