. Fossil plants : for students of botany and geology . Paleobotany. 380 BENNETTITAIiES i^^' seem, however, that in most cases the flowers were bisexual^ (fig. 513). A remarkable feature is the enormotis number of flowers on a single stem; in Cycadeoidea Dartoni^, 54 cm. long and 35 cm. broad, 500—600 flowers were coimted on one. Tio. 513. Cycadeoidea. Restoration of an unexpanded bisporangiate strobilus with some of the hairy bracts removed. Compare Cycadeoidea dacotensis, figs. 529, 530. (After Wieland; ca nat. size.) side. On the other hand the large stem of C. gigantea (fig. 536) shows no f

• Contributor: Central Historic Books / Alamy Stock Photo
• Image ID: PG06TN
• File size: 7.2 MB (510.3 KB Compressed download)
• Releases: Model - no | Property - no
• Dimensions: 1274 x 1962 px | 21.6 x 33.2 cm | 8.5 x 13.1 inches | 150dpi

More information

This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.

This image could have imperfections as it’s either historical or reportage.

. Fossil plants : for students of botany and geology . Paleobotany. 380 BENNETTITAIiES i^^' seem, however, that in most cases the flowers were bisexual^ (fig. 513). A remarkable feature is the enormotis number of flowers on a single stem; in Cycadeoidea Dartoni^, 54 cm. long and 35 cm. broad, 500—600 flowers were coimted on one. Tio. 513. Cycadeoidea. Restoration of an unexpanded bisporangiate strobilus with some of the hairy bracts removed. Compare Cycadeoidea dacotensis, figs. 529, 530. (After Wieland; ca nat. size.) side. On the other hand the large stem of C. gigantea (fig. 536) shows no flowers. All the flowers on a single trunk are approxi- mately in the same stage of development: it would seem, as 1 The flowers are frequently described as protandrous but, as Dr Scott pointed out to me, we have no definite evidence on this point. 2 Wieland (ll^) p. 134; Coulter and Chamberlain (10) p. 67, fig. 55.. 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 work.. Seward, A. C. (Albert Charles), 1863-1941. Cambridge : University Press