. Fossil plants : for students of botany and geology . Paleobotany. XIl] SPHENOPHYLLUM 3 on its upper surface one group, or possibly two groups, of four sessile sporangia between the narrow coherent bases of the laminae and the sinus between the terminal lobes (fig. 113, C). Another characteristic feature is the greater length of the intemodes; this renders the cone less compact and less sharply diflferentiated from the vegetative shoots than those of other species. A specimen in Dr Kidston's collection illustrates the. Fig. 113. A. B. C. Sphenophyllostachys Borneri. (Solms-Laubach.) Sphenophy
. Fossil plants : for students of botany and geology . Paleobotany. XIl] SPHENOPHYLLUM 3 on its upper surface one group, or possibly two groups, of four sessile sporangia between the narrow coherent bases of the laminae and the sinus between the terminal lobes (fig. 113, C). Another characteristic feature is the greater length of the intemodes; this renders the cone less compact and less sharply diflferentiated from the vegetative shoots than those of other species. A specimen in Dr Kidston's collection illustrates the. Fig. 113. A. B. C. Sphenophyllostachys Borneri. (Solms-Laubach.) Sphenophyllum trichomatosum Stur. Sphenophyllum inajus. Bronn. (A—C. After Kidston.) peculiar character of the fertile portion of this species; it con- sists of an axis bearing a succession of lax sporophylls succeeded above and below by whorls of sterile leaves. In this species, therefore, we cannot speak of a compact strobilus at the end of a shoot of limited growth, but of axes in which sterile and fertile leaves are borne alternately^ a condition recalling the 1 Bower (08) p. 404, fig. 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
Size: 1134px × 2203px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublishercambr, bookyear1898
