. Fossil plants : for students of botany and geology . Paleobotany. xxxni] CORDAITES 237 may be made to Cordaites circularis Grand'Eury^ from Gard (fig. 468, B) and a smaller leaf from the same locality compared with C. Lacoei (fig. 468, C) Lesq. Cordaites circularis is characterised by the almost orbicular lamina traversed by sHghtly spreading veins; it recalls some of the larger Cyclopteris pinnules of Pterido- sperm fronds and is indistinguishable from some leaves assigned to the genus Dolerophyllum^.. Pig. 468. A, Cordaites root-system {Bhizo-Gordaites); B, Cordaites circularis leai; C, Co
. Fossil plants : for students of botany and geology . Paleobotany. xxxni] CORDAITES 237 may be made to Cordaites circularis Grand'Eury^ from Gard (fig. 468, B) and a smaller leaf from the same locality compared with C. Lacoei (fig. 468, C) Lesq. Cordaites circularis is characterised by the almost orbicular lamina traversed by sHghtly spreading veins; it recalls some of the larger Cyclopteris pinnules of Pterido- sperm fronds and is indistinguishable from some leaves assigned to the genus Dolerophyllum^.. Pig. 468. A, Cordaites root-system {Bhizo-Gordaites); B, Cordaites circularis leai; C, Cordaites sp., cf. Cordaites Lacoei; D, Cordaites crasaifoliun, upper and lower surface of leaf. (After Grand'Eury.) The species C. Lacoei was founded by Lesquereux^ on some detached specimens 3—12 cm. long and 1-5—5 cm. broad; it is by no means certain that a specimen referred by Grand'Eury* with some hesitation to this species is Cordaitean. The generic name Scuto-Cordaites was proposed by Eenault^ for a specimen from Commentry consisting of a flattened branch bearing a few imperfectly preserved leaves. The surface of the branch shows semicircular leaf-scars on decurrent, spirally disposed leaf-cushions and bears a certain resemblance to a slender stem 1 Grand'Eury (90) A. p. 325, PI. vi. fig. 15. 2 Schmalhausen (87) PI. v. figs. 7—9. 3 Lesquereux (80) A. p. 535, PI. Lxxxvn. figs. 2—i. * Grand'Eury, loc. cit. p. 324, PI. rv. fig. 14. 5 Renault and Zeiller (88) A. p. 603, PI. Lxin. fig. 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 Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press
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