] 14 POLYGONACEAE 



3. Ruraex vertioillatus L. Swamp Dock. (Man. p. 355 ; I. F. /. 

 1304..) Ill swamps, Quebec to Iowa, Fla. and Tex. — Pennsylvania: 

 Franklin; Sosqoehanna. 



4. Rumex altissimus Wood. Tai,l OR Peach-leaved Dock. (Man. 

 p. 355 ; I. F.y. ijoj.) Along streams and in swamps, Mass. to Neb. and 

 Tex.— Pennsylvania : Lancaster, Safe Harbor ; Crawford. 



5. Rumex Patientia h. Patience Dock. (Man. p. 356; I. P./. 

 1306.) In waste places, Vt. to Wis., Pa. and Kans. Nat. from Eu. — 

 Pennsy Ivania : 



6. Rumex Britannica L. GREAT Water-dock. (Man. p. 356 ; I. P. 

 /. /3oy.) In wet places, N. B. to Minn., N. J., Pa., 111. and Iowa. — 



Pennsylvania : Wayne. 



7. Rumex crlspus L. Curled Dock. (Man. p. 356 ; I. F./. rsog.) 

 In fields and waste places, nearly throughout the U. S. and souihern B. 

 Am. Nat. from Eu. Native also of Asia. — Pennsylvania. Northamp- 

 ton ; Bucks ; Chester ; Lancaster ; Frankwn ; Delaware ; Alle- 

 gheny. 



8. Rumex aanguineus L. Bloody or Red-veined Dock. (Man. p. 

 356; I. F. y. /J//.) la waste places and ballast, N. Y. to Va. and La. 

 Nat. or adv. from Eu.— Pennsylvania : Bucks, Rockfield. 



9. Rumex obtusifoliuB L. BroadlEaved or BiTTER Dock. (Man. 

 p. 357 ; I. F. f. I3r3.) In waste places, N. S. and N. B. to Ore., Fla. and 

 Tex. Nfttive also of Asia. Nat. from Eu. — Pennsylvania : Northamp- 

 ton ; Bucks ; Centre ; Chester ; Lancaster ; Monroe ; Delaware; 

 Allegheny. 



2. fagopyrum l. 



1. Pagopyrum Fagopyrum (L. ) Karst. Buckwheat. (Man. p. 358; 

 I. F._/. 1316. ) lu waste places, escaped in all parts of northern U. S. and 

 southern B. Am. Native of eastern Eu. or western Asia. — Pennsyl- 

 vania : Northampton ; Monroe ; Lancaster ; Cumberland. 



3. POLYGONUM L 



Leaf-blades jointed at the base : ocreae 2-lobed, becoming lacerate : filaments, 

 at least the inner, dilated. 

 Stems branched at the base, the branches prostrate or spreading. 

 Achene pointed at the apex, rounded at the base. 

 Leaf-blades mostly acute at the apex : acbenes not pinched at the apex. 



1. P. aviculare. 

 Leaf- blades mostly obtuse at the apex : achenes pinched at the apex. 



2. P. littorale. 

 Achene pointed at both ends. 3. P. Bellardi. 



Stems erect or ascending, more or less diffusely branched above. 

 Leaf-blades without lateral impressions : mature calyx corrugated. 



4. P. erecium. 

 Leaf-blades with lateral impressions : mature calyx not corrugated. 



5. P. tenue. 

 Leaf-blades not jointed at the base : ocreae various, not 2-lobed : filaments 



slender. 



