174 NORTH AMERICAN FLORA [VoLUME 9 
i : in involute, minutel : 
eae small, the pileus up to 5 cm. broad; margin invo y Yh pnoiule: 
Il. RUSTICANAE 
Pileus glabrous, at least at first, gray to brown with lilac tints; lamellae P i laten 
thin, not staining. ae was eae 
Pileus scabrous-hairy, olivaceous-green ; lamellae staining dark-green. 9. L. atroviridis. 
hh 
III. TORMINOSAE 
Latex white, unchanging. 
Pileus some shade of yellow, usually zonate, glabrous in the center. 10. L. torminosa. 
Pileus white to flesh-colored tinged with fuscous, azonate, the center eet 
tomentose. ll. L. ctlicioides. 
Latex white, becoming yellow. : 
Pileus yellowish, eae to subzonate ; stipe scrobiculate-spotted. 12. L. scrobiculata. 
Pileus white, azonate; stipe sometimes spotted but not scrobiculate. 13. Z. vesima. 
IV. INSULSAE ; 
Pileus zonate ; spores yellowish. 14, L. inselsa. 
Pileus azonate ; spores white. 15. L. affinis. 
V. TRIVIALES 
Latex staining the lamellae glaucous-green. . 
Pileus gray to yellowish-gray, becoming paler in the center, sometimes ae 
livid; spores yellow. : 16. L. irivialts. 
Pileus sepia, becoming paler toward the margin; spores white. 17. L, mucida. 
Latex not staining the lamellae. . 
Pileus gray, zoned with raw-umber, fading to gray. 18. L. circellaia. 
Pileus dark dull-red, occasionally zonate. 19. L. hysgina. 
VI. AGGLUTINATAE 
Pileus buff, papillate when wet, squamulose when dry. 20. L. agglutinata. 
Pileus whitish, zonate, sparsely covered with coarse, short tomentum. 21. L. lanuginosa. 
Pileus olivaceous-umber, blackening in drying, azonate, glabrous or agglu- : 
tinated-fibrous. 22. L. turpis. 
VII. SPECIOSAE 
Pileus whitish to honey-colored, zoned with darker yellow ; latex white, 
scanty in mature plants, staining the wounded flesh or lamellae helio- ; 
trope. 23. L. speciosa. 
Pileus dull-yellow, azonate; latex very abundant, white, then watery, 
then lilac. 24. L. representanea. 
VIII. ASPIDEAE 
Pileus yellow. 
Pileus azonate ; latex acrid. 25. L. aspidea. 
Pileus zonate ; latex bitter. 26. L. aspideoides. 
Pileus gray. 
Pileus faintly zoned or azonate, up to 8 cm. broad. 27. L. lividorubescens. 
Pileus conspicuously zoned and spotted, 7-12 cm. broad. 28. L. maculata. 
IX. CROCEAE 
Pileus saffron-yellow to orange-cadmium; latex becoming yellow-cad- 
mium, very scanty. . 29. L. crocea. 
Pileus maize-yellow tinted with yellowish-salmon; latex becoming sul- 
fur-yellow, scanty. 30. L. delicata. 
X. DELICIOSAE 
Latex orange-colored. 31. L. deliciosa. 
Latex saffron-yellow. 32. L. Chelidonium. 
Latex dark-red. 33. L. subpurpurea. 
Latex indigo-colored. 34. L. Indigo. 
XI. THEIOGALAE 
Latex mild, bitterish, then acrid, becoming sulphur-yellow. 
Pileus pinkish-buff to terra-cotta or fulvous and zonate, or pallid and 
azonate. — . 35. L. theiogala, 
Pileus whitish, azonate, the entire plant becoming brownish-red with 
age. . . 36. £. colorascens. 
Latex very acrid, becoming golden-yellow. 37. L. chrysorhea, 
XII, QUIETAE 
Latex mild. 
Pileus 5-15 em. broad, rarely viscid, not shining; flesh thick. 38. L. guieta. 
Pileus 2-4 cm. broad; flesh thin. 
Pileus mahogany-red, shining-viscid when moist. 39. L. nitida. 
Pileus fulvous, fading, papilla persisting dark. 40. L. oculata. 
Pileus brownish-drab to yellowish-brown, fading. 41. L. paludinelia. 
