Fig. 6. <i><a href="//commons.wikimedia.org/wiki/Botrychium_lanceolatum" title="Botrychium lanceolatum">Botrychium lanceolatum</a></i> from Vol. 1 of <i><a href="//commons.wikimedia.org/wiki/Britton_%26_Brown,_Illustrated_flora_of_the_northern_states_and_Canada" title="Britton &amp; Brown, Illustrated flora of the northern states and Canada">An Illustrated Flora of the Northern United States, Canada and the British Possessions</a></i>
Nathaniel Lord Britton &amp; Addison Brown
1896
An Illustrated Flora of the Northern United States, Canada and the British Possessions (1896)