202 NORTH AMERICAN FLORA [VoLuME 9 
Spores ochraceous; pileus red, purplish-red, rosy, or 
rosy and yellow intermingled. 
Surface viscid; pellicle separable. XX. BETULINAE. 
Surface scarcely viscid; pellicle scarcely 
separable. XXI, OcHROPHYLLAE. 
Taste acrid. 
Pellicle separable half way to the disk. ; 
Lamellae equal, simple; plants fragile. XV. PALUSTRES. 
Lamellae nearly equal, some forking; plants rather firm. XIII. VETERNOSAE. 
Pellicle not easily separable; surface scarcely viscid. XIV. SANGUINEAE. 
I. Compacta&e 
Pileus white, becoming rusty-ochraceous with age or in drying; wounds 
turning reddish, but not black. 
Lamellae broad, subdistant. 1. R. compacta. 
Lamellae narrow, close. . 2. R. magnifica. 
Pileus white, becoming blackish or fuliginous with age or in drying. 
Wounds changing to reddish, then black. oe 
Lamellae distant. 3. R. nigricans. 
Lamellae crowded. 4, R. densifolia. 
Wounds changing to blackish at first. . 
Surface of pileus dry. 5. R. sordida. 
Surface of pileus viscid. . 6. R. subsordida. 
Wounds not becoming red or black, but the entire surface becoming 
fuliginous. 7. R. subusia. 
Pileus persistently white or whitish. 8. R. delica. 
Pileus yellowish, yellowish-brown, sordid, or brownish-gray from the first. 
Surface persistently smooth. 
amellae becoming reddish or umber where wounded, or at least 
with age or in drying. 7 
Lamellae distant. 9. R. eecentrica. 
Lamellae very crowded. 10. R. polyphylia. 
Lamellae not changing color where wounded. 
Pileus cream-colored or deeper yellow. 11. R. cremoricolor. 
Pileus grayish-yellow. 12. R. mustelina. 
Surface becoming rimose-areolate to floccose-scaly. 13. R. Morgani. 
II. Lepipar 
Spores pale-yellow. 
Pileus sanguineous-rosy, fading, often yellowish on the disk. 14. R. lepidea. 
Pileus rose-purple on the margin, olive-green in the center, fading. 15. R. xerampelina. 
Spores white; pileus white, sometimes becoming tinged with alutaceous. 16. R. lactea. 
III. Crustosaz 
Spores pure-white. 
Pileus green intermingled with yellowish, striate on the margin; taste 
tardily acrid. 17. R. crustosa. 
Pileus green, even on margin; taste mild. 18. R. virescens. 
Spores yellow or tinged with yellow. 
Surface of pileus furfuraceous; spores almost white. 19, R. viridella. 
Surface of pileus pruinose-tomentose or velvety; spores maize-yellow. 20. R. modesta. 
IV. SvuBVELUTINAE 
Pileus some shade of red or vinous-purple. 
‘Taste mild. 
Surface red; the broken context not becoming sticky where handled. 21. R. subvelutina. 
Surface vinous-purple, often intermingled with yellowish, very 
variable; the broken context becoming sticky where handled. 22. R. Mariae. 
‘Taste soon acrid. 23. R. rubriochracea. 
Pileus yellow 24. R .flavida. 
Pileus violaceous; stipe white. 25. R. Murrillit. 
V. ATROPURPUREAR, 
Weaunss becoming sordid-brown to umber; the entire surface brownish in 
rying. . 26. R. atropu ed. 
Wounds not becoming brown; the entire surface pale-smoky in drying. 27. R. pee tes ag 
VI. INSIGNES 
Stipe yellowish, adorned, at least below, with deeper yellow granules or 
squamules. 
Pileus becoming minutely granular except on the disk; taste mild. 28. R. insignis 
a a Agree ophaga reigs pal ah the disk; taste acrid. 29. R. Ballouii. 
ipe tinged with pink; pileus rose-pink, becoming gran i ing 
Stipe white, glabrous. F : & granular 30. R. corallina. 
Pileus white or faintly tinged with pink or yellow in the center, minutely 
_granulose, lamellae decurrent. 31. R. blanda 
Pileus pale-lilac, fading to white, minutely floccose or fibrillose. 32. R. flocculosa. 
VIE. PrcTINaTA! 
Margin deeply and widely striate. 7 
