Fungi of Florida, H.H. Hume [1-100]
Stevenson (1971) notes, "Assuming that Hume's plan was to issue a century, the three sets available for reference unfortunately all lacked Nos. 55, 61, 63, 64, 68, 69, 74, 76-78, 84-87, and 89-100, some or all of which may never have been issued."