POLYGONACEAE. 



Rumex hastatulus Muhl. Engelrnann's Sorrel. (Fig. 1300.) 



Rumex hastatulus Muhl. Cat. Ed. 2. 37. 1818. 

 R. Engelmanni Meisn. in DC. Prodr. 14: 64. 1856. 



Perennial from a wood}- base, glabrous, dioe- 

 cious; stem rather strict, simple or branched, 

 erect, 5'-2o' tall. Leaves hastate, oblong or ob- 

 lanceolate, I'-s' long, the basal numerous, more 

 or less auricled at the base, subacute, petioled, 

 those of the stem linear, all papillose; ocreae sil- 

 very, 2-parted, at length lacerate; racemes as- 

 cending, at length interrupted; calyx green, 

 slender-pedicelled, winged in fruit; pedicels 

 equalling or longer than the wings; wings orbi- 

 cular, mostly broader than high, cordate, i ' 4 '"- 

 i^" long; stamens slightly exserted; achene 

 reddish, smooth, shining, less than i // long, in- 

 vested by the calyx-wings, its angles margined. 



On the sea-coast, southern New York to Florida 

 and on the plains from Kansas to Texas, a geogra- 

 phic distribution nearly the same as that of Cheno- 

 podium leplophyllum. March-Aug. 



Sour 



3. Rumex Acetosa L,. Sorrel. 

 Dock. (Fig. 1301.) 



Rumex Acetosa L. Sp. PI. 337. 1753. 



Perennial, glabrous, dioecious; stem erect, sim- 

 ple, grooved, i-3 tall. Leaves oblong-hastate 

 or ovate-sagittate, i'-5' long, acute at the apex, 

 crisped or erose on the margins, the basal few, 

 long-petioled, the upper subsessile, the acute au- 

 ricles entire or I -toothed and more or less re- 

 flexed; ocreae lacerate; racemes nearly erect, 

 crowded, at length interrupted; calyx green, i // 

 long, pedicelled, winged in fruit; pedicels equal- 

 ling or shorter than the wings, jointed near the 

 middle; wings broadly ovate or orbicular, cor- 

 date, 2"-2*4" long; achene rather more than 

 i" long, pointed, smooth, shining, blackish, 

 invested by the calyx-wings. 



Labrador to Alaska. Naturalized from Europe in 

 Pennsylvania. 



Vermont. New York and 

 also of Asia. Summer. 



Native 



4. Rumex venosus Pursh. Veined 

 Dock. (Fig. 1302.) 



Rumex venosus Pursh, Fl. Am. Sept. 733. 1814. 



Perennial by a woody rootstock, glabrous, stem 

 rather stout, erect, somewhat flexuous, 6 / -i5 / tall, 

 grooved, branched. Leaves ovate, ovate-lanceo- 

 late or oblong, i'-5 r long, acute at both ends or 

 acuminate at the base, petioled, rather coriaceous; 

 ocreae funnelform, thin, brittle; racemes mostly 

 erect, soon interrupted; calyx red, pedicelled, very 

 conspicuously winged in fruit; pedicels at matur- 

 ity rather stout, slightly shorter than the wings, 

 jointed at about the middle; wings large, y 2 '-\ 1 2 ' 

 broad, suborbicular with a deep sinus at the base, 

 veiny, reddish; style-branches divergent in fruit; 

 achene 3" long, smooth, shining, its faces concave, 

 its angles margined. 



Northwest Territory to Oregon and Washington, 

 south to Missouri and Nevada. Ma3*-Aug. 



