304 DICOTYLEDONOUS PLANTS. 



HAB. Fields. Can. to Car. June, July. 1C. Stem 23 feet 

 high, furrowed. Flowers in crowded whorls, on pedicels. Dis- 

 tinguished from the former by its Jarge membranaceous valvi-s. 

 Introduced. < 'nrh-d Dock, 



3. R. sanguineus Linn. : valves small, oblong, one or more granuli- 

 ferous; leaves lanceolate, somewhat cordate, petioled, smooth, inosth 

 'with red veins. 



HAB. Fields and road sides. Can. to Car. June, July. "If. 

 Stem 3 feet high. Root leaves large, with blood-red veins. 

 Flowers in small distant whorls. Introduced. Bloody Dock. 







4. R. britannicus Linn. : valves all entire and granuliferous ; leaves 

 broad-lanceolate, flat, smooth j sheaths obsolete ; whorls of flowers 

 leafless. 



HAB. Swamps. Can. to Car. June, July. 1C. Root fusiform, 

 yellow internally. Stem 3 feet high. Leaves large, on petioles. 

 flowers in a compound terminal panicle, polygamous. 



Yettoic-rooted Water Dock. 



5. R. tertic'dlatus Linn. : valves entire, all of them granuliferous ; 

 flowers whorled, in long nearly simple leafless racemes ; leaves lanceo- 

 late, acute, flat ; sheaths cylindrical. 



HAB. Swampy grounds. N. S. June, July. l[. Stem 2 feet 

 high, leaves long, lanceolate, narrow. Whorls few- flowered. 

 '/eels half an inch or more in length. 



ft Inner valves of tfte perianth toothed. 



(5. /. acutus Linn. : valves oblong, somewhat toothed, all granulifer- 

 ous ; leaves cordate-oblong, acuminate; whorls numerous, small , leafy. 

 HAB. Moist grounds. N. S. June. U.Stem 23 feet high. 

 Introduced. V; '" 



7. R. palUdus Big. : valves ovate, entire, hardly larger than the 

 grain ; leaves linear-lanceolate, acute ; spikes slender. 



HAB. Salt marshes. Mass. June. 21. Stems numerous, as- 

 cending, slightly furrowed. Leaves smooth, petioled, more or 

 less waved on the margin. Spikes slender. Fruit crowded, the 

 valves acute. 



- R. obtusifolius Linn. : valves ovate, toothed, one chiefly granuli- 

 ferous ; leaves cordate-oblong, obtuse, somewhat crenate and waved ; 

 upper ones narrower and more acute ; stem roughish. 



HAB. Woods and fields. N. S. July. 1C. Stem 2-3 feet high. 

 Leaves very large. Floiccrs in long nearly leafless racemes. In- 

 troduced. 



** Floioers dioecious. ACETOSA. 



9. R. acetosella Linn.: leaves lanceolate, hastate; lobes acute, 

 spreading ; racemes paniculate ; valves of the fruit grainless. 



HAB. Fields, &c. Throughout the U. S. June, July. H- 

 Stem 612 inches high. The plant has a pleasant aeid taste. 



Sheep SorrtL 



