. Off-hand sketches : a companion for the tourist and traveller over the Philadelphia, Pottsville, and Reading railroad . FIG. 10.—CATLOPTERIS. FIG. 11.—EXISTING TREE-FERN. thus regarded as dicotyledonous, or exogenous and compact trees,Dr. Lindley has divided from them another genus, termed caulopteriSt ANTHRACITE COAL FORMATION 129 ■which he considers true stems of tree-ferns. These are hollow, butthe markings which they exhibit present so close a resemblance toexisting tree-ferns as to leave no doubt of their identity with thoseplants. They are, however, comparatively rare in the coal; whil
. Off-hand sketches : a companion for the tourist and traveller over the Philadelphia, Pottsville, and Reading railroad . FIG. 10.—CATLOPTERIS. FIG. 11.—EXISTING TREE-FERN. thus regarded as dicotyledonous, or exogenous and compact trees,Dr. Lindley has divided from them another genus, termed caulopteriSt ANTHRACITE COAL FORMATION 129 ■which he considers true stems of tree-ferns. These are hollow, butthe markings which they exhibit present so close a resemblance toexisting tree-ferns as to leave no doubt of their identity with thoseplants. They are, however, comparatively rare in the coal; while ofthe true Sigillaria, over forty species have been discovered. We ap-pend a figure of the fossil stem, caulopteris, 10, and a figure of anexisting tree-fern, 11, in juxtaposition for comparison. The family of Lepidodendra have, by some writers, been supposedto belong to that of the club-mosses ; while the larger species wereregarded as forming a transition to the coniferous plants. The livingspecies of their supposed analogues, fig. 12, abound in tropical cli-mates ;—they generally creep on the ground, so
Size: 1269px × 1969px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, bookidoffhandsketc, bookyear1854
