1909] STREETER—DIRECTION OF GROWTH OF AMANITA 419 
In experimenting with the stem of Cephalaria procera, one of the 
teasels, Sacus (1888) found that this supra-curvature was neutralized 
BA ish Sirty AT ty eal EE 
| 
_ __ Fic. 7.—A. phalloides: a, as planted; 6, 6 hours later, poms tie eet 
: of 20°; c, 17 hours after planting, having returned to 10° below vertical; d, 30 hou 
_ after planting, tip of stipe vertical. 
and the stem soon moved back to the vertical position. In the case 
