[Vol. 7 

 84 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



6. Pileus drying bright yellow, finally fading in the herbarium, of bibulous 



texture; in West Indies to Paraguay 9. S. aurantiacum 



6. Pileus drying tawny olive to Saccardo's umber, not of bibulous texture 

 but coriaceous-hard instead; lateral-stemmed forms are the more 

 common; 5 mm.-25 cm. high, 2-10 mm. broad; in New York to 



Cuba, and in Wisconsin 12. S. tenerrimum 



7. Somewhat cespitose, obscurely zonate, not bearing a cluster of coarse 

 processes near base of the pileus, I5-4 cm. high, 8 mm.-3 cm. in 

 diameter; in Ohio and North Carolina to Mexico and West Indies 



IS. S. pergamenum 



7. With a crest of coarse hairs or processes towards base of the pileus; pileus 



6-10 mm. across; on dead Vitis in South Carolina I4. S. cristatum 



8. Hair-like cystidia more or less numerous but no gloeocystidia; pileus 

 cartridge-buff, strigose-squamose; on the ground, Vermont to 



North Carolina, and in Europe 15. S. pallidum 



8. Gloeocystidia barely distinguishable, but no cystidia; pUeus pUcate on 

 both surfaces, with the upper diamine-brown and the hj'menium 

 white; on the ground, Porto Rico to British Guiana. . .16. S. elegans 

 8. Gloeocystidia present but no cystidia; pUeus drying pale cinnamon; 



on dead wood, Jamaica to Trinidad 17. S. decolorans 



§11. LATERAL-STEMMED SPECIES 



9. Fructifications not cespitose 10 



9. Fructifications cespitose; pileate segments pectinate along their margins; 



on decaying wood, Carolina to Bolivia 24. S. Hartmanni 



9. Fructifications rarely cespitose, usually gregarious; margin of pileus thick 

 and entire; spores 6x5m, becoming subangular; in Jamaica to Dutch 



Guiana 18. S. radicans 



10. Growing on ground; pileus white when fresh, drying smoke-gray, 



not zonate; spores 4—65 X 3-5m; in West Indies 19. S. pusiolum 



10. Growing on dead wood ; pileus of soft bibulous texture, drying pinkish 



buff, 3-6 mm. wide, 5-7 mm. long; in Cuba and Porto Rico 



23 S. cyphelloides 



10. Growing on dead wood; pUeus not of soft bibulous texture 11 



11. Pileus drying Verona-brown to chestnut, minutely velvety; stem velvety; 



spores 4-5X3-4;u; in the West Indies 20. S. glabrescens 



11. Pileus whitish when living, livid and pellucid upon drying, 4-6 cm. high, 



with stem ^-1 cm. long; in Guadeloupe 21. S . flabellatum 



11, Pileus white when fresh, drying "reddish brown," 8-15 mm. long, 3-15 mm. 



broad, often deeply spht into segments; in Brazil 22. S. fissum 



§111. MERISMATOID SPECIES 



12. Densely cespitose and concrescent throughout into a cluster 7 cm. in 

 diameter, with color and aspect of Tremellodendron pallidum; in 

 Mexico and Dutch Guiana 25. S. craspedium 



12. Fructification a sessile, rosette-shaped mass of reddish brown pileate 



flaps; in San Domingo 26. S. petalodes 



12. Fructification stipitate, white, with many pileate divisions extending 

 out from a common stem; with aspect of doubled forms of Thele- 

 phora caryophyllea but white; in Cuba 27. S. anastomosans 



12. Fructifications cespitose, somewhat creeping by tips of branches 

 becoming attached to the matrix by disks; pileate branches 1-1^ 

 cm. long, 1-2 mm. broad; in Brazil 28. S. proliferum 



§IV. EFFUSO-REFLEXED SPECIES 



13. Hyaline, flexuous gloeocystidia conspicuous in the subhymenium and 



hymenium 15 



13. Pjriform, vesicular organs present in tramajSubhjTnenium, or hymenium ... 16 

 13. Colored conducting organs in trama, subhymenium, or hymenium; cystidia 

 absent; hymenium bleeds when wounded, if in vegetative condition. 

 *S. hirsutum and S. rameale sometimes have occasional colored conducting 

 organs in the hymenium 17 



