<i>Agave protuberans</i> (= <i><a href="//commons.wikimedia.org/wiki/Manfreda_guttata" title="Manfreda guttata">Manfreda guttata</a></i>), Asparagaceae, Agavoideae
<a href="https://en.wikipedia.org/wiki/Matilda_Smith" class="extiw" title="en:Matilda Smith">M.S.</a> del, <a href="https://en.wikipedia.org/wiki/John_Nugent_Fitch" class="extiw" title="en:John Nugent Fitch">J.N.Fitch</a>, lith.
1912
Curtis's Botanical Magazine, London., vol. 138 [= ser. 4, vol. 8]: Tab. 8429 - <a rel="nofollow" class="external autonumber" href="http://www.botanicus.org/page/465694">[1]</a>