Plate 173 from American Medicinal Plants, <i>Iris versicolor</i>
<bdi><a href="https://en.wikipedia.org/wiki/en:Charles_Frederick_Millspaugh" class="extiw" title="w:en:Charles Frederick Millspaugh"><span title="American botanist, botanical collector, scientific artist and journalist (1854-1923)">Charles Frederick Millspaugh</span></a>
</bdi>
1887
<a rel="nofollow" class="external free" href="https://archive.org/details/americanmedicina00mill">https://archive.org/details/americanmedicina00mill</a>