162 Clavarias of the United States and Canada 



throughout, sometimes simple but usually once to thrice dichoto- 

 mously forked, the branches cylindric, spreading, drying every- 

 where buffy brown, the apices acute ; spores slightly colored under 

 the microscope, even, 7.5-9 x 4.5-5fx." 



Idaho : Priest River. On bark of log of Pinus contorta, October 10, 1920. 

 Weir, No. 16946. Type. (Mo. Bot. Gard. Herb., Weir Herb., and 

 U.N. C. Herb.). 



Clavaria acris Pk. Rept. N. Y. St. Mus. 54: 155, pi. H, figs. 

 37-39. 1901. 



Plate 89 



The following description is from Peck : 



"Stem short, branching from near the base, the branches re- 

 peatedly and subpalmately branched, sometimes compressed, tough, 

 solid, reddish incarnate, whitish within, tips acute, whitish or con- 

 colorous, the axils often rounded; taste acrid; mycelium white; 

 spores broadly elliptic, pale ochraceous, 4-5 x 6-7. 6\x [original in 

 inches]. 



"Much decayed wood of coniferous trees. ... It forms tufts 

 1.5-3 inches high and nearly as broad." 



This seems most like C. apiculata, but the spores are distinctly 

 shorter (averaging about 7[k long), and the former is not acrid. 

 We have examined the type and find the spores to be minutely 

 warted, 3.8-4.8 x 6-7 A\x, darker under the microscope than those 

 of C. apiculata or C. suecica. It is quite different from the very 

 acrid C. pyxidata. Plants received from Weir (Priest River, 

 Idaho) determined as this species by Burt have much longer 

 spores, 3.8-5 x 7.4-10^, which are paler under the microscope. 



Illustrations : Burt. Ann. Mo. Bot. Gard. 9 : pi. 5, fig. 30. 1922. 

 Peck. As cited above. 



New York: Floodwood. August. Peck. (Albany Herb, and Burt Herb.). 



Clavaria stricta Pers. Comm., p. 45 (177). 1797. 



?LachnocIadium Aikinsonii Bres. Journ. Myc. 8: 119. 1902. 

 C. leucotephra B. & C. Grevillea 2 : 7. 1873. 

 C. condensata Fr. Epicr., p. 575. 1838. (Sense of Bresa- 

 dola and Romell). 



