This is plate 50 from <a href="//commons.wikimedia.org/wiki/James_Sowerby" title="James Sowerby">James Sowerby</a>'s <a href="//commons.wikimedia.org/wiki/Coloured_Figures_of_English_Fungi_or_Mushrooms" title="Coloured Figures of English Fungi or Mushrooms">Coloured Figures of English Fungi or Mushrooms</a>.  See below for more details.
<a href="//commons.wikimedia.org/wiki/James_Sowerby" title="James Sowerby">James Sowerby</a>
Extracted from <a href="//commons.wikimedia.org/wiki/File:Coloured_Figures_of_English_Fungi_or_Mushrooms.djvu" title="File:Coloured Figures of English Fungi or Mushrooms.djvu">Image:Coloured Figures of English Fungi or Mushrooms.djvu</a>, which was obtained from the Internet Archive at <a rel="nofollow" class="external free" href="https://archive.org/details/colouredfigureso00sowe">https://archive.org/details/colouredfigureso00sowe</a>