. Catalogue of the fossil plants of the Glossopteris flora in the Department of geology. Paleobotany -- Carboniferous; Paleobotany -- Catalogs and collections; Plants, Fossil -- Catalogs and collections. G6 GLOSSOPTERrS. Type. No. 50G, Museum d'histoire naturelle, Paris. Fronds often large, but varying greatly in size, shape, and in the details of the nervation. Fronds elongate-lanceolate, or broadly oval-lanceolate, gradually contracted at the base. Apex acute, or acuminate. Midrib stout, persisting to the apex. Secondary nerves numerous, crowded, arched near the midrib, sub-parallel, straigh
. Catalogue of the fossil plants of the Glossopteris flora in the Department of geology. Paleobotany -- Carboniferous; Paleobotany -- Catalogs and collections; Plants, Fossil -- Catalogs and collections. G6 GLOSSOPTERrS. Type. No. 50G, Museum d'histoire naturelle, Paris. Fronds often large, but varying greatly in size, shape, and in the details of the nervation. Fronds elongate-lanceolate, or broadly oval-lanceolate, gradually contracted at the base. Apex acute, or acuminate. Midrib stout, persisting to the apex. Secondary nerves numerous, crowded, arched near the midrib, sub-parallel, straight, meshes narrow, very elongate, polygonal, rhomboidal, or trapezoidal. Meshes larger on the borders of the midrib, contracting towards the margin. Scale-fronds more or less rhomboidal with lateral angles rounded ; 15-50 mm. in length and 15-25 mm. broad. No median nerve; lateral nervation arched, forming elongate meshes. The chief characters which distinguish G. indica from other species are the large, lanceolate, acute fronds, with their close,. Fig. 17.—Glos&opteris indica, Schimper. Enlarged drawing of the nervation of the type-specimen. After Zeiller. x 1^. sub-parallel secondary nervation, and transversely elongate areoles. The fronds measure 15-40 cm. in length, and are 2-5- 10 cm. broad at widest part. Zeiller1 has recently given a detailed account of the variations in the habit and nervation of this species. Sometimes the meshes are larger near the midrib than at the margin, and in other specimens they are more nearly equal in size. The course of the nerves is also somewhat less parallel and less regular iu some 1 Zeiller (96l), p. 366; (021), p. 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; Arber, E. A. Newell (Edward Alexander Newell)
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