. The story of the earth and man [microform]. Geology; Paleontology; Man; Géologie; Paléontologie; Homme. 122 THE STORY OF THE EARTH AND belong most of tte ordinary trees of temperate climates. To the second belong the palms and allied trees found in tropical climates. To the third belong the pines and cycads. In the second or Cryptogamous series we have also three classes,— (1.) The Acrocjens, or ferns and club-mosses, with stems having true vessels marked on the sides with cross-bars—the Scalariform vessels. (2.) The Ano- phytes, or mosses and their allies, with stems and leaves, but n
. The story of the earth and man [microform]. Geology; Paleontology; Man; Géologie; Paléontologie; Homme. 122 THE STORY OF THE EARTH AND belong most of tte ordinary trees of temperate climates. To the second belong the palms and allied trees found in tropical climates. To the third belong the pines and cycads. In the second or Cryptogamous series we have also three classes,— (1.) The Acrocjens, or ferns and club-mosses, with stems having true vessels marked on the sides with cross-bars—the Scalariform vessels. (2.) The Ano- phytes, or mosses and their allies, with stems and leaves, but no vessels. (3.) The Thallophijtes, or lichens, fungi, sea-weeds, etc., without true stems and leaves. " In the existing climates of the earth we find these classes of plants variously distributed as to relative numbers. In some, pines predominate. In others, palms and tree-ferns form a considerable part of the forest vegetation. In others, the ordinary exogenous trees predominate, almost to the ex- clusion of others. In some Arctic and Alpine regions, mosses and lichens prevail. In the Coal period we have found none of the higher Exogens, though one species is known in the Devonian, and only a few obscure indications of the presence of Endogens; but Gymnosperms abound, and are highly characteristic. On the other hand, we have no mosses or lichens, and very few algae, but a great number of ferns and Lycopodiacege or club- mosses. Thus the coal formation period is botanically a meeting-place of the lower Phsenogams and the higher Cryptogams, and presents many forms which,. 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 Dawson, J. W. (John William), Sir, 1820-1899. Toronto : Copp Clark
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