Part 4, 1915] AGARICACEAE 208 
Odor resembling that of bitter almonds when fresh, stronger with age 
or in drying. 
Lamellae mostly simple; pileus thin, up to 8 cm. broad. 33. R. pectinata. 
Lamellae more or less forked; pileus thick, 8-12 cm. broad. 34, R. foetens. 
Odor not pronounced. 35. R. pectinatoides. 
Margin not deeply and widely striate-tuberculate. 
Surface of pileus pulverulent. 
Stipe glabrous. 36. R. granulaia. 
Stipe granulate. 37. R. pulverulenta. 
Surface of pileus glabrous; hymenophore becoming umber in drying. 38. R. ventricosipes. 
VIII. Brripae 
Taste mild or bitter with age, not acrid; lamellae subdistant. 39. R. bifida. 
‘Taste acrid; lamellae crowded. 40. R. variata. 
IX. BasiFuRCATAE 
Taste mild, then bitterish. 41. R. basifurcata. 
Taste acrid. 42, R. albidula. 
XX. HETEZROPHYLLAE 
Taste mild. 
Pileus greenish or mixed with green. 
Spores pure-white; lamellae narrow. 43. R. heterophylia. 
Spores creamy-white; lamellae broad. 44. R. cyanoxantha. 
Pileus yellow. 46. R. Eorlei. 
‘Taste acrid; spores white; margin even. 45. R. consobrina, 
XI. VINACEAE 
Stipe white. 
Pileus dull-garnet on the margin, pale-yellowish on the disk. 47. R. vinacea. 
Pileus cinnabar-red on the margin, whitish on the disk. 48. R. paxilloides. 
Stipe violaceous-purple; pileus Indian-lake to dark-violaceous, paler on 
the margin. 49. R. Queletii. 
XII. OcHRoLeUCAE 
Stipe white, becoming cinereous. 50. R. ochroleuca. 
Stipe white, unchanging. 
Pileus straw-yellow. 51. R. Raoultii. 
Pileus white or sometimes tinged with yellow. 52. R. anomala. 
Stipe pale-ochraceous. 53. R. simillima. 
XIII. VETERNOSAE 
Pileus some shade of red, with yellow often appearing on the disk, or some 
shade of yellow and orange. 
Spores yellowish-buff; pileus old-blood-red to incarnate, fading, 
whitish or yellow on the disk. 54, R. veternosa. 
Spores ochraceous. 
Pileus blood-red or rosy-red, sometimes spotted with white or 
orange blotches. 55, R. tenuipes. 
Pileus Corinthian-red, fading, the center tinged with yellow. 56. R. corinthiirubra. 
Pileus honey-yellow on the disk to coppery-orange on the margin. 57. R. aurantialutea. 
Pileus Morocco-red, not fading. 58. R. borealis. 
Pileus dark-violet when dried. 59. R. atroviolacea, 
Pileus vinous-purple to dark-purple, with chamois color and greenish 
intermingled. 
Color not fading; stipe bulbous. 60. R. Robinsoniae. 
Color fading. 61. R. expallens. 
XIV. SANGUINEAE 
Spores creamy-white; lamellae close, soon decurrent. 62. R. sanguinea. 
Spores pale-yellow; lamellae subdistant, adnate. 63. R. mexicana. 
XV. PaLUSTRES 
Pileus slate-violet on the margin, the center vinous-purple surrounded by 
yellowish; tardily acrid. 64, R. palustris. 
Piieus lilac-rose to salmon- jilac, the center darker surrounded by gray- 
green or stone-color; very fragile; promptly acrid. 65. R. gracilis. 
XVI. GLAUCAE 
Stipe white, unchanging. 
Pileus glaucous-green intermingled with rosy-flesh-color or salmon- 
flesh-color and maize-yellow; margin striate; lamellae becoming pale- 
yellow. 66. R. glauca, 
Pileus pale-olivaceous, becoming yellow on the disk, no pink tints 
present; margin even; lamellae becoming deep- yellow. 67. R. subolivascens. 
Pileus aerugineous-green, leaden-gray, or paler, sometimes umber on 
the disk; spores whitish. 68. R. aeruginea. 
