171 



a seedling peach with well-developed buds in the axils of the 

 cotyledons led to experiments with beans, which ordinarily be- 

 have in a like manner, in every case producing axillary buds. 

 Halsted records the same thing in seedlings of the Hubbard 

 squash. 



Edward W. Berry. 

 Passaic, N. J. 



Arisaema pusillum in Pennsylvania and New Jersey. — As 

 this interesting "Jack" has only recently been recognized as in 

 good standing, and comparatively little has been recorded con- 

 cerning its geographical distribution, a summary of its occurrence 

 in the vicinity of Philadelphia may prove of interest. 



It was first detected in Pennsylvania, so far as I am aware, by 

 my cousin, Hugh E. Stone, who found a colony of plants in an 

 open bog near Christiana, Lancaster County, May, 1902, a spot 

 which furnishes the only station in the county, I believe, for Sar- 

 racenia and one of the few stations for Drosera rotundifolia. 



Late in the same year Mr. Stewardson Brown found some 

 plants in fruit at Clementon, N. J., in a wooded swampy spot, 

 which he suspected to be this species, and in May of the present 

 year his surmise was proved to be correct ; while he also found 

 the plant blooming abundantly near Medford, N. J., in similar 

 shady, swampy ground. Soon after, I detected it in a shady 

 swamp near Haddonfield, N. J., and Mr. Brown found a small 

 colony near the Schuylkill River, a few miles above the city limits 

 of Philadelphia. Subsequently I found it abounding in both 

 open and shaded swamps in central Chester County, Pa., at a 

 spot marked as the residence of J. D. Steele, in the map accom- 

 panying Darlington's " Flora Cestrica." 



In some locations Arisaema tripliyllum grew with A. pusillum, 

 but the two were most readily distinguished and there was no suspi- 

 cion of intergradation. A. pusillum is a close ally of A. Steivard- 

 soni, both being late-flowering species as compared with A. triphyl- 

 lum. Apparently Arisaema Stewardsoni replaces A. pusillum to 

 the northward in the mountains, as we have it from various points 

 in the Pocono region and from North Mountain, Sullivan County, 

 Pa., where it occasionally associates with A. tripliyllum us pusillum 



