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

252 SECTION HYGROPHORUS
lar (in dried material), smooth, tinged yellowish in Melzer's reagent.
Basidia 37-56 x 6-8(9) t, 4-spored. Pleurocystidia and cheilocystidia
none. Gill trama (in dried material) only slightly or not at all divergent,
often slightly interwoven, hyphae 3-10 v broad. Cuticle of repent, narrow, gelatinous hyphae, 1.5-4 / broad, the gelatinous zone 100-140 M
thick. No hypodermium differentiated. Pileus trama interwoven, hyphae radially disposed. Clamp connections not found.
HABIT, HABITAT, AND DISTRIBUTION-In leaf mold, under magnolia, Florida, January.
MATERIAL STUDIED-FLORIDA: Murrill 16030 (type, from Alachua
Co., Jan. 9, 1938).
OBSERVATIONs-The description of macroscopic characters above
is taken from Murrill's (1938) original account. We have studied the
type; the description of microscopic characters given above is based on
these type studies.
In his Latin description, Murrill (1938) states that the stipe is viscid, although he omits this point in the English version. Sections of
dried material do not revive well, and the gill trama does not show the
typical divergent condition. A study of revived material of other species
of section Hygrophorus which were known to have divergent gill trama
was made as a comparison, and it was found that in the less robust
species the trama does not always revive in such a manner as to show
the original arrangement of the hyphae. For this reason further studies
of fresh material are desirable on Murrill's species.
151
Hygrophorus eburneus (Fr.) Fr.
Epicr. Myc., p. 321. 1838
Agaricus eburneus Fr., Syst. Myc., p. 33. 1821.
Limacium eburneum (Fr.) Kummer, Fiihr. in Pilzk., p. 119. 1871.
Illustrations:
Fig. 73.
Atkinson, Mushrooms, Edible, Poisonous, etc., fig. 113.
Bresadola, Icon. Myc., tab. 303.
Bulliard, Herb. Fr., pl. 551, fig. 2.
Dufour, Atl. Champ., pl. 19, fig. 41.
Gillet, Champ. Fr., pl. 122 (335).
Giissow and Odell, Mushrooms and Toadstools, pl. 46, fig. 2.
Krieger, Mushroom Handbook, fig. 93.
Lange, Flora Agar. Dan. 5, pl. 164 E & E1.
Murrill, Mycologia 6, pl. 131.
Ricken, Die Blatterp., pl. 6, fig. 5.
Schaeff., Fung. Bavar., pl. 39 (as Agaricus laetus).
Smith and Hesler, Lloydia 2, pl. 1.
Wakefield and Dennis, Common British Fungi, pl. 34, fig. 3.