. Studies in fossil botany . Paleobotany. i74 STUDIES IN FOSSIL BOTANY by comparison with the cones still in position. In cases where the structure is preserved, additional and convincing evidence is afforded by the anatomy of the axis of the cone, which is quite similar to that of a young vegetative twig of Lepidodendron. As it is very rarely possible to refer the fructifications to the particular species of stem to which they belonged, it is convenient to retain a distinct generic name for them. Most Lepidodendroid cones are de- scribed under the name of Lepidostrobus, but, as we shall see b
. Studies in fossil botany . Paleobotany. i74 STUDIES IN FOSSIL BOTANY by comparison with the cones still in position. In cases where the structure is preserved, additional and convincing evidence is afforded by the anatomy of the axis of the cone, which is quite similar to that of a young vegetative twig of Lepidodendron. As it is very rarely possible to refer the fructifications to the particular species of stem to which they belonged, it is convenient to retain a distinct generic name for them. Most Lepidodendroid cones are de- scribed under the name of Lepidostrobus, but, as we shall see below, all the fructifications of the group cannot be in- cluded under a single genus. For the present we will confine ourselves to the characters of the true Lepidostrobi. The cones of different species vary greatly in their 7o. -L&*«Mm, HMer- dimensions the ]ength ranging tiantts, Binney. Compressed speci- ' o o o men of an almost perfect cone, approximately from about an with the matrix. The exterior L L surface is shown, except at the inch to about a foot. The base, where the axis, with some of the megasporangia, is exposed, form is usually cylindrical (Fig. §nat. size. After Binney. , . r , , JO), but in some of the shorter cones is more ovoid. The strobilus was either sessile or stalked ; the former was no doubt the case if the fruit- ing stem was ever of the Ulodendroid form, while the. 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 Scott, Dukinfield Henry, 1854-1934. London, A. and C. Black
Size: 938px × 2664px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondonaandcblack
