The pictorial sketch-book of Pennsylvania : or, its scenery, internal improvements, resources, and agriculture, popularly described . FIG. 2. ODONTOPTERIS, FIG. 3.—ANOMOPTERIS. The Pecopteris, figure 4, is by far the most numerous of all varietiesof the fern, having upwards of sixty different species in the common brake, or fern, exhibits a type of the family of whichthe figure will serve as a specimen; but the aborescent ferns, whichnow grow only in the vicinity of the equator, present the closestanalogy to those of the carboniferous period, whichwere lofty trees, far surpassing in h
The pictorial sketch-book of Pennsylvania : or, its scenery, internal improvements, resources, and agriculture, popularly described . FIG. 2. ODONTOPTERIS, FIG. 3.—ANOMOPTERIS. The Pecopteris, figure 4, is by far the most numerous of all varietiesof the fern, having upwards of sixty different species in the common brake, or fern, exhibits a type of the family of whichthe figure will serve as a specimen; but the aborescent ferns, whichnow grow only in the vicinity of the equator, present the closestanalogy to those of the carboniferous period, whichwere lofty trees, far surpassing in height and mag-nificence, even their tropical congeners of the presentday. From their number and variety, they affordsome of the most interesting fossil remains which thevegetable kingdom has produced. Their leaves aregenerally elegant, and display great variety of formand diversity of venation; from these characters thegeneric and specific distinctions of the family are ob-tained. They are often preserved in great perfection,and even the organs of fructification are occasionallyobservable at the back of the leaf. Several fine
Size: 1408px × 1775px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade, booksubjectminesandmineralresources
