POL YG ON A CEA E. 355 



stamens exserted; achene less than 2 mm. long, Very granular, exceeding the 

 persistent calyx, its angles not margined. In dry fields and on hillsides through 

 out N. Am. except the extreme north. In large part naturalized from Europe. 

 Sometimes a troublesome weed. May-Sept. 



2. Rumex hastatulus Muhl. EINGELMANN'S SORREL. (I. F. f. 1300.) Per- 

 ennial from a woody base, glabrous, dioecious; stem rather strict, erect, 10-40 cm. 

 tall. Leaves hastate, oblong or oblanceolate, 2-10 cm. long, the basal numerous, 

 auricled at the base, subacute, petioled, those of the stem linear, all papillose; 

 ocreae silvery, 2 -parted, at length lacerate; racemes ascending, at length inter- 

 rupted; calyx green, winged in fruit; pedicels equalling or longer than the wings; 

 wings mostly broader than high, cordate, 2-4 mm. long; stamens slightly exserted; 

 achene reddish, smooth, shining, less than 2 mm. long, invested by the calyx- 

 wings, its angles margined. On the seacoast, S. N. Y. to Fla. and on the plains 

 from Kans. to Tex. March-Aug. 



3. Rumex Acetosa L. SORREL. SOUR DOCK. (I. F. f. 1301.) Perennial, 

 glabrous, dioecious; stem erect, simple, grooved, 30-90 cm. tall. Leaves oblong- 

 hastate or ovate-sagittate, 2-12 cm. long, acute, crisped on the margins, the basal 

 few, long-petioled, the upper subsessile, the acute auricles entire or I -toothed and 

 more or less reflexed; ocreae lacerate; racemes nearly erect, crowded, at length 

 interrupted; calyx green, 2 mm. long, winged in fruit; pedicels equalling or shorter 

 than the wings, jointed; wings cordate, 4-5 mm. long; achene rather more than 

 2 mm. long, pointed, smooth, shining, blackish, invested by the calyx-wings. 

 Lab. to Alaska. Naturalized from Europe in Vt., N. Y. and Penn. Summer. 



4. Rumex venosus Pursh. VEINED DOCK. (I. F. f. 1302.) Perennial by a 

 woody rootstock, glabrous, stem rather stout, erect, somewhat flexuous, 15-40 cm. 

 tall, grooved, branched. Leaves ovate to oblong, 2-12 cm. long, acute at both 

 ends, petioled, rather coriaceous; ocreae funnelform, thin, brittle; racemes mostly 

 erect, soon interrupted; calyx red, pedicelled, conspicuously winged in fruit; pedi- 

 cels at maturity rather stout, slightly shorter than the wings, jointed at about the 

 middle; wings broad, suborbicular, with a deep sinus at the base, veiny, reddish; 

 achene 6 mm. long, smooth, shining, its faces concave, its angles margined. N. W.. 

 Terr, to Ore. and Wash., South to Mo. and Nev. May- Aug. 



5. Rumex salicifolius Weinm. WHITE, PALE or WILLOW-LEAVED DOCK. 

 [. F. f. 1303.) Perennial, glabrous, pal 

 spreading, flexuous, 3-9 dm. high. Leaves lanceolate, linear-lanceolate or the lower 



(I. F. f. 1303.) Perennial, glabrous, pale green; stem erect, ascending, or sometimes 



oblong, acute or acuminate at both ends, or rarely obtuse at the apex, petioled; 

 racemes erect, divergent or reflexed, dense, in fruit interrupted below, 2 mm. long, 

 pedicelled; pediceU slightly longer than the wings, jointed near the base; wings 

 triangular-ovate, 3 mm. long, undulate or subdentate. each bearing a large ovoid 

 tubercle; achene 2 mm. long, dark red, its faces concave, its angles slightly mar- 

 gined. In swamps, Lab. to S. N. Y., Fla., Neb., Tex. and L. Calif. Also in Europe. 

 May-Sept. 



6. Rumex verticillatus L. SWAMP DOCK. (I. F. f. 1304.) Perennial, gla- 

 brous, rather bright green; stem erect, ascending or decumbent, 6-15 dm. long, 

 more or less flexuous when old. Leaves narrowly oblong, oblong-lanceolate or 

 lanceolate, 5.30 cm. long, narrowed at both ends or obtusish at the apex, slightly 

 papillose, long-petioled; racemes interrupted below, spreading in fruit; calyx 

 green, 2 mm. long; pedicels stout, thickened above, jointed near the base, 3-5 times 

 as long as the wings, or rarely shorter; wings broadly deltoid, 4 mm. long, more 

 or less decurrent on the pedicel, each bearing a narrowly ovoid tubercle; acher.e 

 2.5 mm. long, reddish, pointed, its faces concave. In swamps, Quebec to Ont. 

 and Iowa, south to Fla. and Tex. May-July. 



7. Rumex altissimus Wood. TALL or PEACH-LEAVED DOCK. (I. F. f. 

 1305.) Perennial, glabrous, rather pale green; stem erect, simple or sparingly 

 branched above, 3-12 dm. tall. Leaves lanceolate, oblong-lanceolate or ovate- 

 lanceolate (sometimes oblanceolate), 5-25 cm. long, acute at both ends, papillose; 

 panicle rather open; racemes slightly interrupted in fruit; flower.s .densely 

 whorled, 2 mm. long; pedicels slender, jointed near the base, as long as the wings; 

 wings triangular-cordate, 4-5 mm. long, usually one oi them only bearing an ovoid 

 tubercle; achene 3 mm. long, dark red, its faces concave. Along streams and in 

 swamps. Mass, to Neb., Md. and Tex. April-June. 



