Clavarias of the United States and Canada 17 



site), or yellowish; thickened or expanded upward with or without 

 branches, the tips simple or crested. These are simple forms of 



C. cristata (p. 68) 



8. Plants 1-2 cm. high, with a distinct brownish stem and pale club which 



is once or twice forked or antlered C. rufipes (p. 106) 



9. Growing on wood, the branches terminating in expanded cups, from 



the margins of which other branches spring ; color yellow to tan or 

 brownish; taste usually acrid; spores smooth, 2.2x4// 



C. pyxidata (p. 92) 



9. Not growing on wood and the branches not expanded into cups 10 



10. Pure white, or at times pale pinkish upward, pliable ; odor of old ham ; 

 spores nodulated, 5-7.5//. long C. angulispora (p. 103) 



10. Pure white, pliable, small, odorless; spores very small, minutely 

 asperulate, 2.5-3.5 x 3.5-4. 5/x C. Kunzei (p. 95) 



10. White or nearly so, larger and more fragile than C. Kunzei and spores 

 3.4-4x4-5.2/* and more distinctly asperulate 



C. subcaespitosa (p. 101) 



10. Form and spores of C. Kunzei, but color white to alutaceous, and 

 terminal branches rose pink, at least when young 



C. arbor ca (p. 105) 



10. Pure white or pale brown or cream, except for rufescent stem or stem 

 base; small; spores smooth, about 2.8-3 x4-5.5/x C. rufipes (p. 106) 



10. White, the stalk gray ; spores oval to subglobose, asperulate, 4-6// 

 thick -..- C. lentofragilis (p. 102) 



10. Ochraceous. flexible ; spores oboval, 2.5-3 x 4-5//, asperulate 



C. asterella (p. 105) 



10. A beautiful clear violet color when fresh ; spores ovate-elliptic, smooth, 

 3.3-4 x 3.7-6.6//.. C. amethystina (p. 90) 



10. Rich chrome orange or golden yellow throughout, very small and deli- 

 cate ; spores subspherical, obscurely asperulate, 2.5-2.7 x 3-3.3// 



C. crocea (p. 107) 



10. Like C. crocea, in form and spores, but stem white and branches 

 lavender C. pulchclla (p. 109) 



10. Like C. crocea in color, but up to 2.5 cm. high, and stem scurfy and 



paler ; spores minutely asperulate, 3-3.7 x 3.5-4.5// 



C. vestitipes (p. 110) 



11. Growing on wood (trunks, stumps or fallen branches and twigs) or on 



bark at base of trees 12 



11. Growing on decaying needles of coniferous trees (or rarely on very 

 rotten coniferous wood) ; size small to medium 14 



11. Growing on the ground and in rotting leaves or humus in deciduous or 



mixed woods 18 



12. Branches usually expanded above into a series of saucers from the 



margins of which new branches arise ; taste usually peppery ; spores 

 minute, 2.2x4// _._.C. pyxidata (p. 92) 



