Diagram of a Saxifrage <i>Saxifraga tridactylites</i>
Unknown author<span style="display: none;">Unknown author</span>
1911
<a rel="nofollow" class="external text" href="https://archive.org/details/encyclopaediabri24chisrich/page/262">Encyclopædia Britannica, 11th ed., Vol. 24, p. 263</a>