. Fossil plants : for students of botany and geology . Paleobotany. XXVIl] ALETHOPTERIS 575 triangular form divided into pinnate branches replaced in the apical region by linear segments. The pinnules, 8—30 mm. long and 3—5 broad, are linear- or oval-lanceolate with an obtuse apex; the upper margin of the lamina is slightly contracted at the base, while the lower edge is Fig. 375. Alethopteris Serlii (Brongn.). From a specimen in the York Museum, f nat. size. Alethopteris Serlii (Brongniart)^ Fig. 375. This species, figured by Parkinson in 1811, closely re- sembles A. lonchitica, b
. Fossil plants : for students of botany and geology . Paleobotany. XXVIl] ALETHOPTERIS 575 triangular form divided into pinnate branches replaced in the apical region by linear segments. The pinnules, 8—30 mm. long and 3—5 broad, are linear- or oval-lanceolate with an obtuse apex; the upper margin of the lamina is slightly contracted at the base, while the lower edge is Fig. 375. Alethopteris Serlii (Brongn.). From a specimen in the York Museum, f nat. size. Alethopteris Serlii (Brongniart)^ Fig. 375. This species, figured by Parkinson in 1811, closely re- sembles A. lonchitica, but is distinguished by the more crowded and relatively longer pinnules which are joined to one another by a narrow connecting lamina (Fig. 375). The secondary veins in A. Serlii are rather finer and more numerous. Grand'- Eury^ records the association of the seed Pachytesta with fronds of this species in the Coal-Measures of St Etienne. 1 For synonymy, see Kidston (94) p. 596; (03) p. 806; White (99) p. 117. 8 Grand'Eury (04).. 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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