1 14 POLYGONACEAE 



3. Rumex verticillatus L. Swamp Dock. (Man. p. 355; I. V. f. 

 /304.) In swamps, Quel^ec to Iowa, Fla. and Tex. — Pennsylvania: 

 Franki^in; Susquehanna. 



4. Humex altissimus Wood. Tai^i, or Peach-leaved Dock. (Man. 

 P- 355 ; I- ^-f- 1305.) Along streams and in swamps, Mass. to Neb. and 

 Tex. — Pen?tsylvatiia : Lancaster, Safe Harbor; Crawford. 



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

 /J06.) Jn waste places, Vt. to Wis., Pa. and Kans. Nat. from Eu. — 

 Penns\lvania : 



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

 f. 1307.) In wet places, N. B. to Minn., N. J., Pa., 111. and Iowa. — 



Pennsylvania : Wayne. 



7. Rumex crispus L. Curled Dock. (Man. p. 356; I. V.f. 1309.) 

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

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

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

 gheny. 



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

 356; I. F. y. 1311-) In waste places and ballast, N. Y. to Va. and La. 

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



9. Rumex obtusifolius L. Broad-leaved or BiTTER Dock. (Man. 

 P- 357 ■) I- ^- /■ ^3^3 ■) I" waste places, N. S. and N. B. to Ore., Fla. and 

 Tex. Native also of Asia. Nat. from Eu. — Pennsylz'ania : Northamp- 

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

 Allegheny. 



2. FAGOPYRUM L. 



1. Fagop3/Tum Fagopyrum (L. ) Karst. Buckwheat. (Man. p. 358; 

 I. F.y. 13 16. ) III 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 : achenes 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. erectutn. 

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



5. P. tenxte. 

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



slender. 



