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XXV.—Some Points in the Anatomy of Dicksonia

Published online by Cambridge University Press:  15 September 2014

Samuel Williams
Samuel Williams
Affiliation:
Glasgow University
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Extract

Our knowledge of the anatomy of Dicksonia is mainly based on the description of D. Barometz given by Gwynne-Vaughan. The stem of this species possesses a radial dictyostele, which, on account of the shortness of the leaf gaps, is not far removed from the solenostelic condition. The leaf trace arises as a broad ribbon of tissue with inwardly folding margins, which soon, however, breaks up to form a horse-shoe of isolated strands.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 45 , Issue 3 , 1926 , pp. 286 - 296
Copyright
Copyright © Royal Society of Edinburgh 1926

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References

page 286 note * Gwynne-Vaughan, “Observations on the Anatomy of Solenostelic Ferns,” Part II, Ann. Bot., 1903.

page 286 note † Bower, Origin of a Land Flora, p. 595.

page 286 note ‡ De Bary, Comparative Anatomy, p. 286.

page 286 note § Obtained through the courtesy of Mr Banks, of the Glasgow Botanic Gardens.

page 288 note * De Bary, Comparative Anatomy, p. 346.

page 288 note † Gwynne-Vaughan, loc. cit., p. 731.

page 288 note ‡ Schlumberger, Otto, Flora, N.F. 2, 1911. Earlier literature on the subject is quoted here.

page 291 note * Williams, “Note on ‘Equisetoid’ Hairs,” Ann. Bot., 1925.

page 291 note † Bower, F. O., The Ferns, vol. i, p. 199.

page 291 note ‡ The operation of the Size Factor is fully discussed by Professor Bower in his paper on “Size, a Neglected Factor in Stelar Morphology,” Proc. Roy. Soc. Edin., vol. xli.

page 291 note § Loc. cit., p. 14.

page 292 note * The companion cells (Geleitzellen) of Russow, Vergl. Unter.

page 292 note † Wardlaw, C. W., “Size in Relation to Internal Morphology. No. 1—Distribution of the Xylem in the Vascular System of Psilotum, Tmesipteris, and Lycopodium,” Trans. Roy. Soc. Edin., vol. liii.

page 293 note * Wardlaw, loc. cit., in which the bearing of these observations on the physiology of translocation is discussed and need not be repeated here. The literature bearing on the subject is also there quoted.

page 293 note † De Bary, Comparative Anatomy, p. 344.

page 295 note * Marsh, A. S., “ The Anatomy of some Xerophilous Species of Cheilanthes and Pellaea,” Ann. Bot., 1914, p. 677. Vide figs. 7, 8, and 9.