. Maryland geological survey. A B Fig. 8.—A. Radial longitudinal section of an ovulate strobilus of Cyca-deoidea, somewhat reduced. (After Wieland.) B. Semi-diagrammatic longitudinal section of a bisporangiate strobilus ofCycadeoidea, about one-fourth natural size. (After Wieland.) as shown in fig. 8 in actual section at A, and semi-diagrammatically at gigantic stamens, if they may be called stamens, which is aterm of very doubtful propriety, have not been found unfolded, but asthe American material is immature Wieland rightly supposes that theyeventually opened out as shown in part in f


. Maryland geological survey. A B Fig. 8.—A. Radial longitudinal section of an ovulate strobilus of Cyca-deoidea, somewhat reduced. (After Wieland.) B. Semi-diagrammatic longitudinal section of a bisporangiate strobilus ofCycadeoidea, about one-fourth natural size. (After Wieland.) as shown in fig. 8 in actual section at A, and semi-diagrammatically at gigantic stamens, if they may be called stamens, which is aterm of very doubtful propriety, have not been found unfolded, but asthe American material is immature Wieland rightly supposes that theyeventually opened out as shown in part in fig. 8, B. * Renault, Bassin Houill, dAutun, 1896, fasc. 4, pt. 2, p. 329, pi. 73, figs. 1-7. Maryland Geological Survey 319 Since these fructifications are obviously reduced lateral branches, thebracts at least, if not the staminate and ovulate appendages as well, repre-senting leaves, it follows that the ancestral cycadophytes were more or lessslender, unarmed, branching forms somewhat similar to the TriassicAnomozamites s


Size: 1584px × 1577px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaleont, bookyear1901