. Fossil plants : for students of botany and geology . Paleobotany. XXXVIl] WIELANDIBLLA 463 WilUamsonia recentior Dawson. The specimens from the Middle Cretaceous of Canada figured by Dawson^ under this name are very imperfect and of no botanical value. WIELANDIELLA. Nathorst. The specimens on which this genus is founded were originally described by Nathorst from Hor in Scania as WilUamsonia angusti- folia^: in a second paper^ a restoration of the plant was pubHshed. Fig. 566. Wielandiella angvMifolia. (After Nathorst.) (fig. 566). The examination of additional specimens from the Rhaetic of B
. Fossil plants : for students of botany and geology . Paleobotany. XXXVIl] WIELANDIBLLA 463 WilUamsonia recentior Dawson. The specimens from the Middle Cretaceous of Canada figured by Dawson^ under this name are very imperfect and of no botanical value. WIELANDIELLA. Nathorst. The specimens on which this genus is founded were originally described by Nathorst from Hor in Scania as WilUamsonia angusti- folia^: in a second paper^ a restoration of the plant was pubHshed. Fig. 566. Wielandiella angvMifolia. (After Nathorst.) (fig. 566). The examination of additional specimens from the Rhaetic of Bjuf and of cuticular preparations led to the establish- ment of a new genus Wielandia^ for which Wielandiella^ was afterwards substituted, Wielandia having been previously employed for an existing plant. Wielandiella agrees in the general morpho- logy of its bisporangiate flowers with Cycadeoidea, but differs widely from nearly all other members of the Bennettitales in the repeatedly forked slender stem which is in marked contrast to the vegetative axis of any recent Cycad. Among recent Cycads with ' Dawson (85) p. 12, PI. iv. fig. 1. 2 Nathorst (80) p. 50. « Ibid. (09) p. 22, Pis. v., VI. » Ibid. (88); (02) p. 9, Pis. i.—in. 6 Ibid. p. 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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