. Studies in fossil botany . Paleobotany. MEDULLOSEAE 451 discovered by Mr. Kidston, in nodules from the Middle Coal-measures of Dudley, attached to a rachis bearing the characteristic pinnules of Neuropteris heterophylla l (Fig. 169). The specimens are casts, not petrifactions, so no detailed study of structure has been possible, but the ex- ternal characters leave no doubt that the organs in question are seeds. They are of the radially symmetrical type, and the testa has a fibrous structure. Chiefly on account of the latter character Mr. Kidston refers the seeds to the genus Rhab do carpus o
. Studies in fossil botany . Paleobotany. MEDULLOSEAE 451 discovered by Mr. Kidston, in nodules from the Middle Coal-measures of Dudley, attached to a rachis bearing the characteristic pinnules of Neuropteris heterophylla l (Fig. 169). The specimens are casts, not petrifactions, so no detailed study of structure has been possible, but the ex- ternal characters leave no doubt that the organs in question are seeds. They are of the radially symmetrical type, and the testa has a fibrous structure. Chiefly on account of the latter character Mr. Kidston refers the seeds to the genus Rhab do carpus of Goppert and ; The seeds appear to be borne terminally on the fertile branches of the rachis ; it is a striking fact that the seed-bearing frond or pinna should be so little modified as to show the same form of pinnule as the vegetative foliage; the differentiation of the 1 R. Kidston, ''The Fructification of Neuropteris heterophylla" Phil. Trans. Royal Soc, B, vol. cxcvii. 1904. 2 Brongniart, however, limited the genus Rhabdocarpns to seeds with bilateral symmetry (Platyspermeae of Oliver), see Fig. 185, p. 513. 30. â :': â :'::; ^:i_ '"-i_r** Fig. 169.âNeuropteris heterophylla. Seed, at- tached to a branch of the rachis bearing two characteristic pinnules. X 2. After 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 Scott, Dukinfield Henry, 1854-1934. London, A. and C. Black
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