Agaricus atramentarius, 1876
Mary Banning writes the following text in an elegant, handwritten cursive style underneath her illustration:
Plate 73
Order Hymenomycetes Tribe Pileati
Agaricus atramentarius Bull.
Name—atramentaum, ink
Series Pratella Subgenus Coprinus
Species Characters. Pileus rather fleshy, oval shaped, margin irregular, at times the disk is spotted with innate warts or scales; lamellae free ventricose at first white then turn to purple or purple black; stem hollow, white, ring fugacius; from five to six inches high; slender, regular; caespitose or gregarious. Spores 00035 × 00023. inch. The above fungus was found in Druid Hill Park, Baltimore, Maryland, July 15th, 1876. It was gathered in the morning but was so deliquescent that it melted away before five o’clock in the afternoon.