548 POLYGONACEAE. 
2. Rumex hastatulus Muhl. Engelmann’s Sorrel. (Fig. 1300.) 
Rumex hastatulus Muhi, Cat, Ed. 2, 37. 1818. 
R. Engelmanni Meisn. in DC, Prodr. 14: 64. 1856. 
Perennial from a woody base, glabrous, dioe- 
cious; stem rather strict, simple or branched, 
erect, 5/-20’ tall. Leaves hastate, oblong or ob- 
ye lanceolate, 1-5’ long, the basal numerous, more 
5 e or less auricled at the base, subacute, petioled, 
ay those of the stem linear, all papillose; ocreae sil- 
Pat very, 2-parted, at length lacerate; racemes as- 
S é 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, 114 ’/- 
134’’ long; stamens slightly exserted; achene 
reddish, smooth, shining, less than 1// long, in- 
vested by the calyx-wings, its angles margined. 
A 
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. 
3. Rumex Acetosa IL. Sorrel. Sour 
Dock. (Fig. 1301.) 
Rumex Acetosa I,. Sp. Pl. 337. 1753- 
Perennial, glabrous, dioecious; stem erect, sim- 
ple, grooved, 1°-3° tall. Leaves oblong-hastate 
or ovate-sagittate, 1/-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 1-toothed and more or less re- 
flexed; ocreae lacerate; racemes nearly erect, 
crowded, at length interrupted; calyx green, 1// 
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%’’ long; achene rather more than 
1’ long, pointed, smooth, shining, blackish, 
invested by the calyx-wings. 
Labrador to Alaska. Naturalized from Europe in 
Vermont, New York and Pennsylvania. Native 
also of Asia. Summer. 
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’-15/ tall, 
grooved, branched. Leaves ovate, ovate-lanceo- 
late or oblong, 1/-5’ 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, '4’-1%4’ 
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. May-Aug. 
