14 Clavarias of the United States and Canada 



nent threads vary decidedly and are often similar in related groups, 

 they are rarely of much use in separating related species. The 

 threads may be slender and densely packed or large and loosely 

 packed, regular or irregular, with or without clamp connections. 



LITERATURE 



The literature has been referred to throughout this work under 

 the species, but for convenience we will add here the longer 

 American lists and the more recent monographs. 



Burt. The North American Species of C lav aria, with Illustrations of the 

 Type Specimens. Ann. Mo. Bot. Gard. 9: 1, pis. 1-11. 1922. 



Cotton and Wakefield. Revision of the British Clavariac. Trans. Brit. Myc. 

 Soc. 6: 164. 1919. 



Kauffman. Fungi of North Elba. Bull. N. Y. St. Mus. 179 : 80. 1915. 



Massee. British Fungi, p. 433, pi. 34 and pi. 38, fig. 6. 1911. 



Moffat. The Higher Fungi of the Chicago Region. Bull. Chicago Acad. 

 Sci. 7: 141. 1909. 



Morgan. Journ. Cin. Soc. Nat. Hist. 11 : 86. 1888. 



Peck. Rept. N. Y. St. Mus. 24: 81, 104. 1872. 



Rea. British Basidiomycetes, p. 705. 1922. 



Schweinitz. Synopsis fungorum Carolinae superioris. Schr. Nat. Ges. 



Leipzig 1 : 20, pis. 1 and 2. 1822. 



Schweinitz. Synopsis fungorum in America boreali media degentium. 

 Trans. Amer. Phil. Soc. II, 4: 141. 1832. 



Key to the Species of Clavaria 



Plants simple, or at times forked or lobed or slightly branched, single or 

 crowded into groups (cespitose) 1 



Plants with a slender stem, but usually more or less branched above, the 

 branches comparatively few and not much smaller (at times thicker) 

 than the stem ; spores ( except in C. Murrilli, where they are long 

 and spiny) subspherical, smooth, rather large (individual plants in 

 this section vary to simple or only flattened or antlered above) 7 



Plants as above, but usually more branched and spores smaller 9 



Plants much branched from several to numerous slender stems that arise 

 together at the base; color pale gray C. cincroides (p. 78) 



Plants as above, but color salmon with yellow tips, in age ochraceous (see also 

 C. formosa) C. conjunctipes (p. 131) 



