 Stems branching dichotomously, and covered with interrupted ridges. Leaves rudimentary or short, rigid and pointed ; in barren stems, numerous and spirally arranged; in fertile stems and branchlets sparsely scattered or absent; in decorticated specimens...  The Canadian Record of Science - Page 71893Full view - About this book
 | 1899 - 598 pages
...Sandstone of Scotland, which still continues. Dawson describes Psilophyton princeps as follows : " Stems branching dichotomously, and covered with interrupted...leaves rudimentary, or short, rigid, and pointed, . . . Young 1 Guide to the Geology of Scotland, pp. 118, 119 (1844). 2 Quart. Journ. Qeol. Six., vol.... | |
 | Geological Survey of Canada, Sir John William Dawson - 1871 - 152 pages
...134.)—JGS, XV, 479; Fig. 1. Ibid. XVIII, 315. Ibid. XIX, 46.—LD, MD, Gaspe"; also Upper Silurian. Stems branching dichotomously, and covered with interrupted...represented by minute punctate scars. Young branches circmate; rhizomata cylindrical, covered with hairs or ramenta, and having circular -areoles irregularly... | |
 | Sir John William Dawson - 1871 - 168 pages
...134.)— JG 8., XV, 479 ; Fig. 1. Ibid. XVIII, 315. Ibid. XIX, 46.— LD, MD, Gaspi5; also Upper Silurian. Stems branching dichotomously, and covered with interrupted...stems and branchlets sparsely scattered or absent ; i in decorticated specimens represented by minute punctate scars. Young branches circinate; rhizomata... | |
 | Geological Survey of Canada, Sir John William Dawson - 1871 - 210 pages
...134.)— JGS, XV, 479 ; Fig. 1. Ibid. XVIII, 315. Ibid. XIX, 46.— LD, MD, Gasp£; also Upper Silurian. Stems branching dichotomously, and covered with interrupted...numerous and spirally arranged ; in fertile stems and branchleta sparsely scattered qr absent; in decorticated specimens represented by minute punctate scars.... | |
 | Henry Alleyne Nicholson - 1872 - 636 pages
...the Carboniferous period. The following is given by Dr Dawson as the definition of the genus : — " Stems branching dichotomously, and covered with interrupted...and having circular areoles irregularly disposed, Fig 380. — Psifaphyton prinfeps (Dawson). a Rhizome ; b Stem ; c Termination of a branch ; rf Vernation... | |
 | Henry Alleyne Nicholson - 1872 - 652 pages
...the Carboniferous period. The following is given by Dr Dawson as the definition of the genus : — " Stems branching dichotomously, and covered with interrupted ridges. Leaves rudimentary, or short, rigid, and pointec ; in barren stems, numerous and spirally arranged ; in fertile stems and branchlets, sparsely... | |
 | Sir John William Dawson - 1888 - 370 pages
...neighbouring Bay des Chaleurs with its slender stems and creeping, cord-like rhizomes, may be thus described : Stems branching dichotomously, and covered with interrupted...absent ; in decorticated specimens, represented by a minute punctate scars. Young branches circinate ; rhizomata cylindrical, covered with hairs or ramenta,... | |
 | Sir John William Dawson - 1888 - 422 pages
...the Geological Society," vols. xv., xviii., and xix., "Report on Devonian Plants of Canada," 1S71. dichotomously, and covered with interrupted ridges....absent ; in decorticated specimens, represented by a minute punctate scars. Young branches circinate ; rhizomata cylindrical, covered with hairs or ramenta,... | |
 | Sir John William Dawson - 1888 - 322 pages
...fertile stems and branchlets, sparsely scattered or absent; in decorticated specimens, represented by a minute punctate scars. Young branches circinate ;...giving origin to slender cylindrical rootlets. Internal structure—an axis of scalariform vessels, surrounded by a cylinder of parenchymatous cells, and by... | |
 | Sir John William Dawson - 1892 - 324 pages
...Stems branching 65 Fio. 20. — Sphe•iiophyllum antiquum (Erian, Kew Brunswick). See pp. 61, 67. dichotomously, and covered with interrupted ridges....; in barren stems, numerous and spirally arranged ; iu fertile stems and branchlets, sparsely scattered or absent ; in decorticated specimens, represented... | |
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