Part 4, 1915] AGARICACEAE 247 
Columbus, Ohio, have the size and appearance of Melanoleuca lateraria, a species with very 
much crowded lamellae. 
Panus Sullivantii Mont. Syll. Crypt. 149. 1856. Described from Columbus, Ohio. 
The type specimens resemble Collybia. 
18. TECTELLA Earle, Bull. N. Y. Bot. Gard. 5: 433. 1909. 
Pileus reviving, resupinate, poculate, fasciculate: lamellae concentric from a central point: 
spores hyaline: veil soon vanishing. 
Type species, Panus operculatus Berk. & Curt. 
1. Tectella patellaris (Fries) Murrill. 
Panus patellaris Fries, Epicr. Myc. 400. 1838. 
Panus operculatus Berk. & Curt. Ann. Mag. Nat. Hist. III. 4: 296. 1859. 
Tectella operculata Earle, Bull. N. Y. Bot. Gard. 5: 433. 1909. 
Pileus fasciculate-erumpent, cupuliform, apex affixed, 12-14 mm. broad; surface rufous, 
furfuraceo-villous to glabrate: lamellae at first covered by a veil, narrow, thin. 
TYPE LOCALITY: Sweden. 
Hasitat: Dead branches of beech, alder, willow, and birch. 
DISTRIBUTION: Canada to Louisiana i in eastern North America; also in a eas 
ILLUSTRATIONS: Cooke, Brit. Fungi pl. 1144 C; Fries, Ic. Myc. pl. 176, f. 3 
ExsiccatTi: Ellis & Ev. N. Am. Fungi 2010. 
19. HELIOMYCES Lévy. Ann. Sci. Nat. III. 2:177. 1844. 
Pileus circular, thin, subgelatinous, reviving: lamellae adnexed, adnate, or decurrent: 
spores hyaline: stipe central, slender, tubular, horny: veil none. 
Type species, Heliomyces elegans Lev. 
Lamellae few, distant. 
Species growing in the soil; lamellae decurrent. 1. H. terrestris. 
Species growing on decayed wood. 
Pileus white or pallid, not becoming darker on drying. 
Pileus scarcely 1 cm. broad; lamellae decurrent. 
Pileus 1-2 cm. broad; lamellae adnate. 
Pileus some shade of yellow or brown, or becoming so on drying. 
Pileus avellaneous or pale-bay, at least when dry. 
HT. ivanslucens, 
AI. striatus. 
why 
Pileus 2 cm. or less broad. 4. H. subavellaneus. 
Pileus 3-6 cm. broad. 
Pileus deeply umbilicate or infundibuliform. 5. H. subspodoides. 
Pileus plane or only slightly depressed. 6. H. hondurensis. 
Pileus pallid, tinged with yellow or latericeous, at least when dry. 
Pileus and lamellae white or pallid, becoming yellowish on 
drying. 7. H. Peckii. 
Pileus and lamellae tinged with latericeous when dry. 8. H. rubritinctus. 
Pileus and lamellae white, becoming reddish or brown on 
drying; the only temperate ‘Species. 9. H. decolorans. 
Lamellae numerous, crowded; species growing on decayed wood. . 
Hymenophore solitary. 10. H. angustifolius, 
Hymenophore cespitose. 
Pileus umbilicate; lamellae interveined. 11. H. multifolius. 
Pileus umbonate; lamellae not interveined. 12. H. foetens. 
1. Heliomyces terrestris Murrill, sp. nov. 
Pileus convex to subexpanded, umbilicate, gregarious, 1 cm. broad; surface smooth, gla- 
brous, striate over the lamellae, pallid, becoming yellowish on drying, margin entire, con- 
colorous, inflexed on drying: lamellae distinctly decurrent, broad, distant, not interveined, 
white: stipe smooth, glabrous, pallid to pale-reddish-brown, equal, hollow, 2-3 cm. long, 1 mm. 
thick. 
Type collected in soil in British Honduras, 1906, Morton E. Peck (herb. N. Y. Bot. Gard.). 
DIstRiBuTIon: Known only from the type locality. 
2. Heliomyces translucens Murrill, sp. nov. 
Pileus small, thin, entirely translucent, deeply umbilicate, solitary, rea¢hing 1 cm. broad; 
surface pellucid, smooth, glabrous, striate over the lamellae, margin entire, inflexed on drying: 
