. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. M4 WW THE CARBONIFEROUS SYSTEM. 11' 'i 1 ! , i i 1 i ! i 1 .â i! 1.' ⢠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 tho
. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. M4 WW THE CARBONIFEROUS SYSTEM. 11' 'i 1 ! , i i 1 i ! i 1 .â i! 1.' ⢠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 AsterophyUites as only branches and leaves of Calamites; but thougli at first sight the resemblance is great, a close inspection shows that the leaves of AsterophyUites have a true midrib, which is wanting in Calamites. Five species of AsterophyUites have been found in Nova Scotia and New Brunswick (Fig. 165, A). 4. Annularia.âIt is questionable wliether these plants should be separated from AsterophyUites. The distinction is that they produce branches in pairs, and that their whorls of leaves are one-sided, and usually broader than those of AsterophyUites, 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 AsterophyUites is also abundant (Fig. 165, B). Fig. 165.âAsteyophylliten, A, AsterophyUites trineme. (A') Leaf enlarged. i' B, Annularia splienophylloides. (B') Leaf enlarged. C, Splienopliylliimerosum. (C') Leaflet enlarged. (C^) Scalariform vessel. D, Piunularia ramosissima. 5. Sphenophyllum.âTliis 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 pag
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
