North American species of Hygrophorus / L.R. Hesler [and] Alexander H. Smith.

SUBSECTION HYGROPHORUS 249

KEY TO SERIES
1. Carpophore white with golden granules or droplets on stipe apex and/or
pileus m argin...............................................
(149. H. chrysodon is the only known species) Series Chrysodontini, below
1. Not with above combination of characters.......................2
2. Pileus, stipe, and gills white to whitish before maturity............................................. Series Hygrophortus, p. 251
2. Fruiting body more or less colored........................... 3
3. Disc of pileus cinnamon-buff, tan, or darker reddish brown.................................................. Series Disco'dei, p. 262
3. Disc of pileus some other color.............................. 4
4. Disc of pileus yellow to red................. Series, Aurei, p. 273
4. Disc of pileus olive to gray to uniter or gray-brown.............................................. Series Olivaceoum brini, p. 283
149
Hygrophorus chrysodon (Fr.) Fr.
Epicr. Myc., p. 320. 1838
Agaricus chrysodon Fr., Syst. Myc., p. 32. 1821.
Limacium chrysodon (Fr.) Kummer, Fiihr. in Pilzk., p. 118, 1871.
Illustrations:
Fig. 72.
Atkinson, Mushrooms, Edible, Poisonous, etc., fig. 112.
Batsch, Elench. Fung., fig. 212.
Bresadola, Icon. Myc., tab. 301.
Gillet, Champ. Fr., pl. 330.
Giissow and Odell, Mushrooms and Toadstools, pl. 45.
Juillard-Hartmann, Icon. Champ., pl. 50, fig. 17.
Lange, Flora Agar. Dan. 5, pl. 164G.
Ricken, Die Blatterp., pl. 6, fig. 4.
Smith and Hesler, Lloydia 2, pl. 3.
Wakefield and Dennis, Common British Fungi, pl. 19, fig. 4.

Pileus 3-8 cm broad, convex, expanding, subumbonate or obtuse,
white and unicolorous except for superficial numerous golden yellow
("apricot yellow") floccose granules on the margin or over all at first,
viscid when moist, shining when dry, margin at first involute and white
floccose-tomentose. Context white, thick, soft; odor and taste not distinctive.
Lamellae decurrent, white or with yellow powder on the edges,
intervenose, distant, moderately broad.
Stipe 3-8 cm long, 6-12(18) mm thick, white, apex with yellow
floccules which may form an imperfect zone or ring, equal, viscid,
stuffed.
Spores 7-9(10) x 3.5-4.5(5),u, ellipsoid, often inequilateral, at
times curved at the apiculus, smooth, pale yellow in Melzer's reagent,
white in mass. Basidia 40 54 x 6-8 v,, 4-spored. Pleurocystidia and