DescriptionEB1911 Pteridophyta - Equisetum maximum.jpg	English: Drawings of features of Equisetum maximum (see legend below), = Equisetum telmateia subsp. braunii.
Date	published 1911
Source	Encyclopædia Britannica (11th ed.), v. 22, 1911, “Pteridophyta,” fig. 3, p. 607.
Author	William Henry Lang; C, D, E from Strasburger's Lehrbuch der Botanik
Permission (Reusing this file)	Public domainPublic domainfalsefalse This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.

A, Longitudinal section of the rhizome, including a node and portions of the adjoining internodes; k, septum between the two internodal cavities, hh; gg, vascular bundles; l, vallecular canal; s, leaf-sheath.

B, Transverse section of the rhizome; g, vascular bundle; l, vallecular canal. This image has been rotated by 90° compared with its appearance in Britannica.

C. Fertile shoot showing two leaf-sheaths and the terminal strobilus.

D, E, sporophylls bearing sporangia, which in E have opened.