. The geology of Nova Scotia, New Brunswick, and Prince Edward Island, or, Acadian geology [microform]. Geology; Geology, Stratigraphic; Paleontology; Geology, Economic; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. THE CARBONIFEROUS SYSTEM. grew in wet or inundated ground. They had ribbed and jointed stems like the Calamites, but with a stout internal woody cylinder, in which respect they resembled miniature Calamodendra. From the joints pro- ceeded whorls of leaves, or of branchlets, bearing leaves which differed from those of Calamites in their having a distinct mi
. The geology of Nova Scotia, New Brunswick, and Prince Edward Island, or, Acadian geology [microform]. Geology; Geology, Stratigraphic; Paleontology; Geology, Economic; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. THE CARBONIFEROUS SYSTEM. grew in wet or inundated ground. They had ribbed and jointed stems like the Calamites, but with a stout internal woody cylinder, in which respect they resembled miniature Calamodendra. From the joints pro- ceeded whorls of leaves, or of branchlets, bearing leaves which differed from those of Calamites in their having a distinct middle rib or vein. The fructification consisted of long slender cones or spikes, having whorls of scales among the spore cases. Some authors speak of Asterophyllites as only branches and leaves of Calamites ; but though at first sight the resemblance is great, a close inspection shows that the leaves of Asterophyllites have a true midrib, which is wanting in Calamites. Five species of Asterophyllites have been found in Nova Scotia and New Brunswick (Fig. 165, A). 4. Annularia.—It is questionable whether these plants should be separated from Asterophyllites. The distinction is that they produce branches in pairs, and that their whorls of leaves ai'e one-sided, and usually broader than those of Asterophyllites, and united into a ring at their insertion on the stem. One little species is very common in Nova Scotia, and a larger one hitherto included in Asterophyllites is also abundant (Fig. 165, B). Fig. 165.—AslerophyllitM, A, ABterophyllites trlneme. (A>) Leaf enlarged. B, Annularia sphenophylloides. (B') Leaf enlarged. C, Sphenophyllum crosum. (C) Leaflet enlarged. (C) Scalarlform vessel. D, Pinnularia ramosissima, 5. Sphenophyllum.—This is one of the prettiest plants of the coal; its little whorls of wedge-shaped leaves, often scattered thickly over. Please note that these images are extracted from scanned page images that may have been digitally enhanced fo
Size: 1661px × 1504px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
