[VoL. 7 
86 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
cinnamon-buff to hazel; colored conducting organs occasionally present 
VAXEUATEZSERYRECUETEAI ERA TITO 47. rameale 
20. MM 1-13 cm. in diameter, plane, thin, papery, silvery to 
pa : and with a silky luster; common on "T us, Canada, 
s ned seite Ph to Mexico . S. sericeum 
20. Fructifications 3-10 m 2s diamo, pubescent, ‘white. 49. S. pubescens 
20. S. ochroleucum, an ix rfectly known species of Europe, formerly 
in Ameri rica, belongs here. id description of authentic 
men, see ' Pac ug nie 
20. Fructiications 2-4 m iameter, ec] attached by the Spare 
iun: oo ee XR S. conicum 
21. Tobaeco-colored velvety-hirsute, vct ming glabrous towards the is 
- expos g the ish, horny crust of po intermediate layer; hyme- 
se lorte rim x21 Bus Wes Ind... eoe 51. S. vibrans 
21. Villose, Tt intermediate layer not bordered by a crust; spores 
ERE asy coro ee ee e eS 9. S. crassum 
O solution; hy menium ferruginous, radiately ridged; on 
DP T 53. S. radiatum 
22. pii hyaline, notrinerusted, RO A 3 
22, a dark, or becoming dark, cylindric, obtuse, distinguishable 
oes colored conducting organs by more or less granule-incrusta- sl 
2. Cystidia rough-walled or incrusted, somewhat colored either wholly 
the incrustation, pointed, not resembling conducting “a 
22. Cystidia —— not at all colored except in S. cinerascens at 
S; par ses not noteworthy................o.ooooo.o.o.. 6 
22. Cystidia ested not colored; paraphyses noteworthy by color or 
t2 
O tss iura ei 27 
23. Onkmon- zo bone-brown, hoary; Dow cystidia very few; sp 
u; Washington to New Mexico. ............. 54. S. patelliforme 
23. White, villose-tomento — panic! "bright yellow; "rae ae cystidi 
rigs 20-25 X4-6pu, numerous. ............... ess EA ochraceo-flavum 
4. Coriaceous-spongy, dry, usually resupinate; uc Mile e o 
reine: cystidia colored, cylindrie, 90-150 X6-8y; spores ae 
IH northern Unite Aie A a RA dato 56. S. abietinum 
24, very thick, felty, concentrically sulcate, drying with odor of - 
and basidiospores like those of S. abietinum; color 
Dodda spores often present; Rocky Mountain states....... 
presa A 4” gh ota eae bY. S. rugisporum 
24. —— reflexed, tomentose, Prout's brown; hymenium umber 
ystidia and spores as in S. abietinum; Vermont a New York. 
E A A UE . ambiguum 
25. Vinaceous-lilac when young, becoming snuff-brown; cystidia OUT even 
rough-walled or incrusted, 100-200 6-10y; from North Carolina and 
Ohio iar a RE o's ea AAA S. umbrinum 
25. Coriaceous-papery, thin, pliant, tomentose, concentrically sulcate, snuff- 
brown; ymenium velvet 4 snuff-brown, not multizonate; cystidia col- 
ored under the incrustation, conical, 30-75 X12- —25u; Flo rida to Brazil. 
r; 
ar 
25. ien ded adi] IS sulcate, hair-brown; cystidia slightly 
colored, roughened above, 120X43u; on conifers, "northern Uni 
s and Canada, and in Rocky Mountsins. 0. ..0....... 62. S. Chailletii 
25. E usually ies cia a thick; hymenium drab, 6004 thick, con- 
) M dd Y le ase; spores 1 64. S. Vioc TS 
26. c,sometimes brownish small, whitish; erudi. "35-90 X12- -15u; 
spores 15-20X12-14u; Jamaica................ 65. S. magnisporum 
