oe) 
_ 
MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA COLLEGE. 
Polygonum hydropiperoides Macouni Small. 
Polyyonum hydropiperoides var. strigosum Small, Bull. Torr. Club, 19: 355 (1892), 
not P. strigosum R. Br. 
More robust than the type. Stem stout, 3-10 dm. long, clothed with strigose hairs; 
leaves varying from oblong-lanceolate to narrowly lanceolate, obtuse, strigose or strigil- 
lose; ocreae rather longer than in the type, densely strigose and fringed with long con- 
spicuous bristles; calyx white or whitish, often conspicuous. 
Ontario, West Virginia, Indiana and California. 
