74 Clavarias of the United States and Canada 



in the protoplasm of the basidium, but there is no evidence of 

 further spore production. Of C. cristata (pi. 2, figs. 33-35) he 

 says that "in microscopic structure it stands very near to C. 

 cinerea." See also Patouillard in Tab. Fung., p. 67, fig. 154. 

 We have studied carefully numerous specimens of these forms 

 and find that they can be divided into two rather indistinct groups, 

 based on a slight difference in the size of the spores and a tend- 

 ency to become yellow in the dried state in one group and gray or 

 brown in the other. There are, however, many exceptions, and the 

 gap is bridged by numerous intermediate forms. The difference 

 seems to be regional rather than specific, the northern plants more 

 frequently tending to the rugosa form and often with slightly 

 larger spores. Typical results of spore measurements in the two 

 groups are given in tabular form below. 



Rugosa-Krombholzii forms : 



Redding, Conn., No. 25 Spores 7-9.3x8-11/*. 



Chocorua, N. H. (Farlow) Spores 7-9.3x8.5-10.5/*. 



Vaughns, N. Y. (Burnham, No. 38) Spores 7-8x7.6-9.5/*. 



West Fort Ann, N. Y. (Burnham, No. 28) Spores 7-9.3x8.5-10.5/*. 



Sand Lake, N. Y. (Peck) Spores 6.8-9x8.2-10.5/*. 



Monands, N. Y. (Peck) _ Spores 7-8.7 x 8-10/*. 



Pink Bed Valley, N. C. (Murrill & House, No. 375) Spores 7.4-8.8 x 

 8.5- 10/*. 



West Albany, N. Y. (Peck) Spores 7.4-9.3x8-11/*. 



Chocorua, N. H. (Farlow, No. 374) ..Spores 7-8.5x7.5-9.6/*. 



Vaughns, N. Y. (Burnham, No. 29) Spores 7-9.3x8-11/*. 



Hudson Falls, N. Y. (Burnham, No. 49) Spores 7.4-9.5x8.5-11/*. 



Blowing Rock, N. C, No. 5572 ......Spores 7-8.5x8-10.2/*. 



Blowing Rock, No. 5616.... ...Spores 7.4-9.5x9-10.5/*. 



Blowing Rock, No. 5676. .....Spores 7.5-8.5x8-10.5/*. 



France ( Patouillard) Spores 7.5-9.2 x 9-11/*. 



Redding, Conn. (Coker) Spores 74-9.3x8.5-10.5/*. 



Ludlow, Vt. (Miss Hibbard, No. 3) Spores 7-8.5x8-10.5/*. 



Chocorua, N. H. (Farlow, No. 310a) ..Spores 7.6-9.3x8-11/*. 



Chocorua, N. H. (Farlow, No. 310b) Spores 74-9.3 x 8.2-11/*. 



Cristata-cinerea forms : 



Chapel Hill, No. 2246 Spores 6-8x7.4-9/*. 



No. 2251 .....Spores 6.5-7 x 7-8.5/*. 



No. 2221 Spores 5.5-7.4 x 7.4-9.2/*. 



No. 2387 Spores 5.5-7.5 x 7.4-10.5/*. 



No. 2417 Spores 6-7.5 x 7.4-9.5/*. 



No. 2636 Spores 5.5-7 x 7-8.6/*. 



No. 2660 Spores 5.5-7.4 x 7-9/*. 



No. 2694 Spores 6-7.5 x 7.4-9/*. 



No. 2702 Spores 6-7.5 x 7.5-9.3/*. 



