Elias Fries, 5 groups: _Leucosporus_, white; _Hyporhodius_, pink; _Cortinaria_, ochraceous; _Derminus_, rust; _Pratella_, purplish black. Rev. J. M. Berkeley, 5 groups: Very frequently pure white, but presenting also pink, various tints of brown, from yellowish and rufous to dark bister, purple-black, and finally black; _Leucospori_, white; _Hyporhodii_, salmon; _Dermini_, ferruginous; _Pratellae_, brown; _Coprinarius_, black. Dr. Badham, 6 groups: Pure white or a yellow tinge on drying; brown; yellow; pink; purple; purple-black; some pass successively from pink to purple and from purple to purple-black. Mrs. Hussey, 11 shades: White; rose; pale ocher; olivaceous-ocher; reddish-ocher; ochraceous; yellowish olive-green; dull brown; scarcely ferruginous; snuff-color; very dark brown. Hogg & Johnson, 5 groups: _Leucosporei_, white; _Hyporhodii_, salmon; _Dermini_, rusty; _Pratellae_, purplish-brown; _Coprinarii_, black. C. Gillet, 7 shades: White; pink; ochraceous; yellow; ferruginous; black or purplish black; round, ovate, elongated, or fusiform, smooth, tuberculate or irregular, simple or composite, transparent or nebulous, etc. Jules Bel, 5 groups: White; pink; red; brown; black. Dr. Gautier, 5 shades: White; pink; brown; purplish-brown; black. Constantin & Dufour, 5 groups: White; pink; ochraceous; brownish-purple; black. J. P. Barla, 7 groups: _Leucosporii_, white; _Hyporhodii_, pink; _Cortinariae_, ochraceous; _Dermini_, rust; _Pratellae_, purplish-black; _Coprinarii_, blackish; _Coprini_ and _Gomphi_, dense black. L. Boyer, 5 groups, 11 shades: White to cream yellow; pale pink to ochraceous yellow; bay or red brown to brown or blackish bister; rust color, cinnamon or light yellow. W. D. Hay, 5 groups: White; pink; brown; purple; black. C. H. Peck, 5 groups: _Leucosporii_, white; _Hyporhodii_, salmon; _Dermini_, rust; _Pratellae_, brown; _Coprinarii_, black. Saccardo divides the Agaricini into four sections, according to the color of their spores, as follows: Spores brown, purplish brown or black, _Melanosporae_; spores ochraceous or rusty ochraceous, _Ochrosporae_; spores rosy or pinkish, _Rhodosporae_; spores white, whitish or pale yellow, _Leucosporae_. Dr. M. C. Cooke, 5 groups: _Leucospori_, white or yellowish; _Hyporhodii_, rosy or salmon color; _Dermini_, brown, sometimes reddish or yellowish brown; _Pratellae_, purple, sometimes brownish purple, dark purple, or dark brown; _Coprinarii_, black or nearly so.