549 



BUCKWHEAT FAMILY. 



5. Rumex salicifolius Weinm. White, 

 Pale or Willow-leaved Dock. (Fig. 1303.) 



Rumex salicifolius, Wcitim. Flora, 4: 28. 1821. 



Perennial, glabrous, pale green; stem erect.ascend- 

 ing, or sometimes spreading, simple or branched, 

 grooved, flexuous, i-3 high. Leaves lanceolate,, 

 linear-lanceolate or the lower oblong, acute or acu- 

 minate at both ends, or rarely obtuse at the apex, 

 petioled; racemes erect, divergent or reflexed, dense, 

 in fruit interrupted below; flowers in dense clusters; 

 calyx pale green, i" long, pedicelled, winged in 

 fruit; pedicels slightly longer than the wings, jointed 

 near the base; wings triangular-ovate, i%" long, 

 undulate or subdentate, each bearing a large ovoid 

 tubercle; achene \" long, dark red, smooth, shining, 

 its faces concave, its angles slightly margined 



In swamps, Labrador to southern New York, Florida, 

 Texas and Lower California. Also in Europe. May- 

 Sept. 



6. Rumex verticillatus L. Swamp Dock. (Fig. i;> 



Rnmev rerticillalus L. Sp. I'l. $34- '753- 



Perennial, glabrous, rather bright green; stem 

 stout, grooved, simple or nearly so, erect, ascend- 

 ing or decumbent, 2-5 long, more or less flexu- 

 ous when old. Leaves narrowly oblong, oblong- 

 lanceolate or lanceolate, 2'- 12' long, narrowed at 

 both ends or obtusish at the apex, slightly papil- 

 lose, long-petioled; racemes interrupted below, 

 spreading in fruit; flowers in rather dense whorls; 

 calyx green, i" long, winged in fruit; pedicels 

 stout, thickened above, jointed near the base, 3-5 

 times as long -> the wings wings broadly deltoid. 

 2 // long, more or less decurrent on the pedicel, each 

 bearing a narrowly ovoid tubercle; style-branche*. 

 reflexed in fruit; achene i' 4 '" long, reddish, 

 pointed, smooth, shining, its faces concave. 



In swamps, Quebec to Ontario and Iowa, south to 

 Florida and Texas. May-July 



7. Rumex altissimus Wood. Tall or 

 Peach-leaved Dock. (Fig. 1305.) 



Rnmex altissimus Wood, Class-book, 477. 1853. 

 Rumex Britannica Meisn. in DC. Prodr. 14: 47. 



1856. Not L. 1753- 



Perennial, glabrous, rather pale green; stem 

 stout, erect, simple or sparingly branched above, 

 grooved, 2-4 tall. Leaves lanceolate, oblong- 

 lanceolate or ovate-lanceolate (sometimes ob- 

 lanceolate) 2 / -io / long, acute at both ends, 

 papillose; panicle rather open; racemes slightly 

 interrupted in fruit; flowers densely whorled; 

 calyx light green, i" long, winged in fruit; 

 pedicels slender, jointed near the base, as long 

 as the wings; wings triangular-cordate, 2"-2#" 

 long, usually one of them only bearing an ovoid 

 tubercle; achene \W long, dark red, smooth, 

 shining, its faces concave. 



Along streams and in swamps, Massachusetts to 

 Nebraska, Maryland and Texas. April-June. 



