408 



the base ; wings oblong, 4 mm. long ; achene 3-angled, narrowly 

 oblong, acuminate at both ends, 4 mm. long, brown. 

 " Sandhills near the coast, Florida, A. W. Chapman." 

 Strikingly different from anything heretofore described in the 

 genus but related to Polygonella polygama. It differs from all its 

 relatives in its stout build, wand-like stem and remarkably large 

 leaves for the genus. 



6. Polygonella articulata (L.) Meisn. Gen. 2 : 228. 1836-43. 



Polygonum articulatuui L. Sp. PI. 363. 1753- 

 Sandy beaches along the Atlantic coast from Maine to Florida 

 and along the Great Lakes. 



7. Polygonella Americana (F. & M.) Small, Mem. Torn Club, 



5: 141. 1894. 



Gonopyrum Amcricanum F. & M. Mem. Acad. St. Petersb. (VI.) 

 4: 144. 1840. 



Polygonella ericoides Engelm. & Gray, Bost. Journ. Nat. Hist. 

 5: 230. 1847. 



Polygonella Meisncriana Shuttlw.; Meisn. in DC. Prodr. 14: 81. 

 1856. 



Sandy soil, Missouri to Georgia, south to Alabama and Texas. 



With the two excellent specimens from which Meisner drew 

 his original description, to compare with a generous supply of 

 Polygonella Americana and observations in the field, I cannot sep- 

 arate Polygonella Mcisneriana from P. Americana. There may be 

 two species in what is now included in the latter species, but the 

 separation must be on different lines. 



The Genus Warea. 

 I have always been impressed with the remarkably inconsistent 

 descriptions that have been applied to the plant we have known 

 as Warea ample xifoliia. The discovery, by Mr. Nash, of a third 

 species of Warea in western Florida renewed my interest in the 

 group and led me to investigate it. The facts seem to be as fol- 

 lows : In i822Nuttall described Stanleya? amplexifolia,'^ found- 

 ing the species on a specimen from eastern Florida. This plant 

 had amplexicaul leaves. In 1834 Nuttall founded the genus 



* Am. Journ. Sci. 5 : 297. 



