Par? 3, 1910] AGARICACEAE 165 
2. KEROTINUS Reichenb. Consp. 14. 1828. 
Xerotes Fries, Syst. Orb. Veg. 78; hyponym. 1825. 
Xerolus Fries, Elench. Fung. 1: 48. 1828. Not Xerofus R. Brown, 1810. 
Hymenophore tough, reviving, stipitate ; lamellae obtuse, fold-like, usually furcate, veil 
wanting: spores hyaline: stipe central, thick, homogeneous with the pileus. 
Type species, Xerotus afer Fries. 
Stipe central; pileus brownish-white. 1. X. martinicensts. 
Stipe lateral; pileus yellowish. 2. X. Mauryt. 
1. Xerotinus martinicensis (Pat.) Murrill. 
Xerotus martinicensis Pat. in Duss, Enum. Champ. Guad. 48. 1903. 
Pileus rigid, rather thin, convex, papillate, 1-2 cm. broad; surface brownish-white, 
dry, pulverulent, rugulose, plicate-sulcate at the center; margin acute, entire: lamellae 
rigid, not decurrent, few, distant, interveined, unequal, broad, thick, entire, obtuse, 
brownish: stipe slender, central, cylindric, hard, reddish-brown, pubescent, 1-2 cm. long, 
1-1.5 mm. thick. 
TYPE LOCALITY: Martinique. ss 
HABITAT: On rotten limbs of Averrhoa Bilimbi. 
DISTRIBUTION: Martinique and Guadeloupe. 
2. Xerotinus Mauryi (Pat.) Murrill. 
Aerotus Mauryi Pat. Bull. Soc. Myc. Fr. 14: 51. 1898. 
Pileus indurated, flabelliform, rounded in front or lobed, 2-5 < 2-3 em.; surface gla- 
brous, ochroleucous ; margin inflexed, smooth or sulcate, plicate-rugose : lamellae simple or 
forked, interveined,“distant, fuscous, edges thick : spores ovoid, smooth, hyaline, 4-5 X 3: 
stipe short, lateral, attenuate, woody, glabrous, 2-4 mm. long, 2 mm. thick. 
TYPE LOCALITY: Mexico, 
HaBitTatT: Dead wood. 
DISTRIBUTION : Known only from the type locality. 
ILLUSTRATION: Bull. Soc. Myc. Fr. 14: pi. 7, f. 1. 
DOUBTFUL SPECIES 
Xerotus caribaeus Fries, Epicr. Myc. 401. 1838. Based upon specimens collected on 
islands in the Caribbean Sea and figured in Plumier, Traité Foug. p/. 167, C. 
3. DICTYOLUS Quél. Ench. Fung. 139. 1886. 
Corniola S. F. Gray, Nat. Arr. Brit. Pl. 1: 637. 1821. Not Corniola Adans. 1763. 
Leptoglossum P. Karst. Hattsv. 242. 1879. Not Leploglossa DC. 1841. 
Hymenophore fleshy, putrescent, laterally stipitate, sessile or resupinate, growing on 
mosses; lamellae obtuse, fold-like, veil absent: spores hyaline: stipe lateral or wanting. 
Type species, Chanterel muscigenus (Bull.) Fries. 
Lamellae dichotomous; stipe distinct. 1. D. muscigenus. 
Lamellae ramose-reticulate; stipe much reduced or wanting. 2. D. retirugus. 
1. Dictyolus muscigenus Quél. Ench. Fung. 139. 1886. 
Agaricus muscigenus Bull. Herb. Fr. pl. 288. 1785. 
Agaricus Foliolum Afzel. Veg. Suec. Obs. 17. 1785. 
Elvela dimidiata Bull, Hist. Champ. Fr. 290. 1791. 
Chanterel muscigenus Fries, Syst. Myc. 1: 323. 1821. 
Merulius serotinus Pers, Myc. Eur. 2: 22. 1825. 
Pileus submembranaceous, laterally stipitate, spatulate, 1-2.5 cm. broad; surface gla- 
brous, zonate, fuscous to whitish-cinereous; margin entire to undulate or lobed: lamellae 
distant, dichotomous, concolorous: spores ellipsoid, smooth, hyaline, 10-12 x 6-8: stipe 
short, concolorous or slightly darker, villose at the base. 
TYPE LOCALITY: France. 
HABITAT : On mosses. 
DISTRIBUTION: Greenland to South Carolina; also in Europe. 
ILLUSTRATIONS: Bull. Herb. Fr. pi. 258; pl. 498, f. 2. 
ExsiccaTr: Desmaz. Pl. Crypt. 550; Sydow, Myc. Mar. 3/4; Romell, Fungi Scand. #; Roum. 
Fungi Sel. 5906 ; Roum. Fungi Gall. 707; Westend. Herb. Crypt. Belge 764. 
