. Fossil plants : for students of botany and geology . Paleobotany. 352 CALAMITES. [CH. coherent portion of each whorl. The manner of occurrence of the whorls is shown in fig. 94, which has been sketched from a large section in the Williamson collection. The seg- ments of the successive sterile verticils alternate with one another, so that in the surface-view of a cone the long and narrow free bracts appear spirally disposed. Midway between. Fig. 94. Calamostachys Binneyana (Carr.) in longitudinal (radial and tan- gential) section. Sp, sporangiopliores; S, sporangia. (Prom specimen no. 1022 in
. Fossil plants : for students of botany and geology . Paleobotany. 352 CALAMITES. [CH. coherent portion of each whorl. The manner of occurrence of the whorls is shown in fig. 94, which has been sketched from a large section in the Williamson collection. The seg- ments of the successive sterile verticils alternate with one another, so that in the surface-view of a cone the long and narrow free bracts appear spirally disposed. Midway between. Fig. 94. Calamostachys Binneyana (Carr.) in longitudinal (radial and tan- gential) section. Sp, sporangiopliores; S, sporangia. (Prom specimen no. 1022 in the Williamson Collection, British Museum.) these alternating sterile verticils there is a series of fertile appendages, also given oif in regular whorls. Each fertile whorl consists of about half as many members as the segments. 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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Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
