Family 7. AGARICACEAE 
By WILLIAM ALPHONSO MURRILL 
Hymenophore annual, stipitate or sessile, terrestrial or epixylous : context 
usually fleshy, rarely tough or leathery ; hymenium radiately lamellate or pli- 
cate, fleshy or tough, never gelatinous. 
Hymenium plicate, the folds obtuse. Tribe 1. CHANTERELEAE. 
Hymenium truly lamellate. 
Context composed mostly of swollen, vesicular cells. Tribe 2. LACTARIEAE. 
Context composed of slender, elongate cells. Tribe 3. AGARICEAE. 
Tribe 1. CHANTERELEAE.’ Hymenophore annual, stipitate or sessile, ter- 
restrial or epixylous, rarely occurring on living mosses or large agarics : con- 
text usually fleshy, rarely tough or leathery; hymenium plicate, the folds 
obtuse, fleshy or tough, often branching or anastomosing : spores hyaline, 
ochraceous, ferruginous, or green. 
Spores hyaline or ochraceous. 
Hymenophore tough or leathery, reviving. 
Stipe lateral or wanting. 1. PLICATURA. 
Stipe central. 2. XEROTINUS. 
Hymenophore fleshy or membranous, putrescent, not reviving. 
Growing on living mosses. 3. DICTYOLUS. 
Growing on decaying agarics. 4. ASTEROPHORA. 
Growing on the ground or on dead wood. 
Hymenophore simple. 
Pileus thin, membranous, infundibuliform ; plants tropical. 5. TROGIA. 
Pileus fleshy, usually convex or depressed, rarely infundibuli- 
form ; mostly temperate species. 6. CHANTEREL. 
Hymenophore compound, connate-cespitose. 7. POLYOZELLUS. 
Spores ferruginous; stipe lateral or wanting. 8. PLICATURELLA. 
Spores green ; stipe central. 9 
1. PLICATURA Peck, Ann. Rep. N. Y. State Mus. 24: 75. 1872. 
Hymenophore sessile, resupinate, or laterally stipitate, tough, reviving ; lamellae ob- 
tuse, fold-like, not covered by a veil: spores hyaline. 
Type species, Plicatura Alni Peck. 
-& 
Lamellae white or whitish. 
Spores cylindric: temperate species. 
Pileus effused-reflexed, margin sterile. 1. P. nivea. 
Pileus sessile, margin fertile. 2. P. faginea. 
Spores ovoid; tropical species. 3. P. guadeleepentsts. © 
Lamellae yellow. 4. P. flabelliformis. 
Lamellae deep brick-red. 5. P. lateritia. 
1. Plicatura nivea (Fries) P. Karst. Finl. Basidsv. 342. 1889. 
Merulius serpens Sommerf. Suppl. Fl. Lapp. 268. 1826. Not MM. serpens Tode (Abh. Hall. Nat. 
Ges, 1: 355), 1783, 
— Merulius niveus Fries, Elench. eae 1: 59. 1828. 
Plicatura Alni Peck, Ann. Rep. N. Y. State Mus. 24: 76. 1872. (Type from New York.) 
Trogia Aint Peck, Ann. Rep. N. Y. State Mus. 29: 66. 1878. 
Chanterel candidus Peck, Bull. Torrey Club 25: 323. 1898. (Type from Newfoundland.) 
Pileus thin, coriaceous, imbricate, effused-reflexed, 1.5-2.5 cm. broad ; surface brownish- 
tawny, silky-tomentulose, margin sterile: lamellae plicate, unequal, interrupted, narrow, 
angular, obtuse, undulate or crisped, white, becoming inconspicuous at times on drying, 
but reappearing on the application of moisture: spores minute, narrowly cylindric, 
slightly curved, hyaline, 5-6 long. 
1 By WILLIAM ALPHONSO MURRILL. 
VOLUME 9, PART 3, 1910] 163 
