File:EB1911 Paleobotany - Calamostachys.jpg

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EB1911_Paleobotany_-_Calamostachys.jpg ‎(388 × 541 pixels, file size: 107 KB, MIME type: image/jpeg)

Description
English: Drawing of Calamostachys: diagrammatic longitudinal section of the cone, showing the axis (ax) bearing alternate whorls of bracts (br) and peltate sporangiophores (sp) with their sporangia (sm). The upturned tips of the bracts are only shown in every alternate verticil.
Date published 1911
Source “Palaeobotany,” Encyclopædia Britannica (11th ed.), v. 20, 1911, p. 527, fig. 2.
Author Unknown authorUnknown author
Permission
(Reusing this file)
Public domain 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.

File history

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Date/TimeThumbnailDimensionsUserComment
current15:23, 6 September 2017Thumbnail for version as of 15:23, 6 September 2017388 × 541 (107 KB)Bob Burkhardt{{Information |Description ={{en|1=Drawing of ''Calamostachys'': diagrammatic longitudinal section of the cone, showing the axis (''ax'') bearing alternate whorls of bracts (''br'') and peltate sporangiophores (''sp'') with their sporangia (sm). The...
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