File:EB1911 Palaeobotany - Palaeostachya and Archaeocalamites.jpg

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Description
English: A, Palaeostachya. Diagrammatic longitudinal section of cone, showing the axis (ax) bearing the bracts (br) with peltate sporangiophores (sp) springing from their axils; sm, sporangia. B, Archaeocalamites. Part of cone, showing the axis (ax) bearing peltate sporangiophores (sp) without bracts; sm, sporangi.
Date published 1911
Source “Palaeobotany,” Encyclopædia Britannica (11th ed.), v. 20, 1911, p. 527, fig. 3.
Author After Renault. Scott, Studies.
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.

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current15:46, 6 September 2017Thumbnail for version as of 15:46, 6 September 2017761 × 888 (214 KB)Bob Burkhardt{{Information |Description ={{en|1=A, Palaeostachya. Diagrammatic longitudinal section of cone, showing the axis (''ax'') bearing the bracts (''br'') with peltate sporangiophores (''sp'') springing from their axils; ''sm'', sporangia. B, Archaeocala...
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