POLYGONACEAE. Ill 



or lanceolate, acute, cordate or obtuse at base; flowers on short 

 stout rigid pedicels; wings ovate, 2-3 mm. long, with 4-6 rigidly 

 awned teeth on each side. 



Sparingly introduced, Inglewood. Native of Europe. 



3. R. persicarioides L. Annual, pubescent, pale green; stem 

 erect, simple or branched, 2-6 dm. high, sometimes spreading, very 

 leafy; leaves lanceolate or oblong, 2 dm. long or usually less, narrowed 

 at the base or cordate, acute at the apex, the margins undulate and 

 somewhat crisped; panicle simple or branched; racemes erect, leafy 

 bracted; whorls dense, usually rather distant; pedicels equaling or 

 somewhat exceeding the inner calyx-lobes, jointed at the base; 

 inner calyx-lobes oblong, 2 mm. long, with 1-3 bristles on each 

 margin, each bearing an ovoid or oblong grain; achene about 1.5 

 mm. long, pointed, reddish. 



Frequent in moist places, especially along the margins of ponds. 

 Native of Europe. 



4. R. salicifolius Weinm. Glabrous and somewhat glaucous; 

 stems ascending or spreading, simple or branched, grooved, flexuous, 

 4-8 dm. long; leaves mostly lanceolate, acute or acuminate, petioled, 

 not undulate or crisped; racemes dense, interrupted below in fruit; 

 flowers in dense clusters; wings 2 mm. long, undulate or subdentate, 

 each bearing a large ovoid grain; achene 2 mm. long, dark red. 



Frequent in moist places along the coast and in the mountains. 



5. R. conglomeratus Murr. Stems slender, erect, commonly 

 branched, 3-9 dm. high; leaves oblong to lanceolate, 15 cm. long 

 or less, somewhat undulate and crisped, the lower long petioled, 

 cordate at base, acute or obtuse at apex, the upper short petioled; 

 panicle very loose, much branched; racemes slender, interrupted; 

 flowers loosely whorled, the whorls distant; pedicels slender, shorter 

 than or equaling the wings; wings ovate, fiddle-shaped, 3 mm. 

 long, toothed near the base, each bearing a large oblong grain; 

 achene about 1.5 mm. long, pointed, red. 



Common in damp land, especially toward the coast, 



6. R. crispus L. Stems simple or branched above, erect, rather 

 slender, 3-10 dm. high; leaves crisped and undulate, the lower 

 oblong or oblong-lanceolate, 15-30 cm. long, long petioled, the upper 

 narrowly oblong or lanceolate, short petioled, all cordate or obtuse 

 at base; panicle rather open; racemes simple or compound; flowers 

 rather loosely whorled; calyx green; fruiting pedicels about twice 

 the length of the wings, jointed near the base; wings cordate, 3-4 

 mm. long, truncate or notched at base, erose-dentate or nearly 

 entire, each bearing a grain; achene 2 mm. long, dark brown. 



Common in moist places. 



7. R. hymenosepalus Torr, Stems erect, 4-6 dm. high, stout, 

 leafy, simple or branched above; leaves attenuate to a short thick 

 fleshy petiole, oblong to broadly lanceolate, often 3 dm. long, acute, 

 strongly undulate; racemes panicled, about 3 dm. long; pedicels 6-12 

 mm. long; wings 8-12 mm. broad, rose color, deeply cordate, strongly 

 reticulate-veined, grains entirely wanting; achene 4 mm. long. 



Frequent in dry sandy soil. Canaigre of commerce. 



