REVISION OF RUMEX. 87 



scarcely clustered, with ascending branches at or after flower- 

 ing; leaves as much as 7x20 cm., little crenulate, broadly 

 lanceolate to ovate lanceolate, acute, mostly rounded at 

 base ; inflorescence with several or in large plants numerous 

 rather divergent branches, at length congested; whorls 

 dense, approximate; pedicels rather slender, about as long 

 as the fruit, tumidly jointed toward or near the base, more 

 conically thickened; valves 4x5 mm., deltoid, sub-acute; 

 callosities 3, subequal (or occasionally one or none), 

 white, wrinkled and pitted, 1 mm. wide and two-thirds as 

 long as the valve; achene 1.8x3 mm. Class Book, 

 (1847?), 477; Gray, Proc. Amer. Acad. viii. 399. R. 

 Britannica, Meisner, DC. Prod. xiv. 47; Gray, Man- 

 ual, editions prior to the 6th, not. L. fide Gray. 1. c. 

 Rich soil, especially near brooks, etc., Massachusetts and 

 New York to Dakota, south to the District of Col- 

 umbia, Nebraska, and Texas. Specimens examined 

 from Nahant, Mass. (Oakes, as R. pallidus, Bigelow), 

 western New York ( Olinfon, 1864), Pennsylvania (Porter, 

 1857 ; Garber, 1868), Maryland (Smith, 1881), District of 

 Columbia ( Ward, 1876, 1879; Mohr, 1882), West Vir- 

 ginia (Hertz, 1877 and 1878), Ohio (Frank, 1835; Lea; 

 James), Indiana (ex hb. Wood), Illinois, Wisconsin, 

 Dakota (Geyer, 1839, 143; Hayden, 1853; Glatfelter, 

 1865, 376 in part), Nebraska ( Webber, 1886 ; Holms, 1889), 

 Kentucky, Missouri, Iowa, Indian Territory, (Butler, 1877, 

 6), and Texas? (Reverchon, 1876; Tweedy, 1880; Jermy, 

 149). According to memoranda on a St. Louis specimen 

 in the Meisner herbarium, Meisner regards this as the same 

 as R. Claytonii, Campdera ; but there is too much doubt 

 concerning this point for me to displace the now established 

 name given by Wood. Plate 25. 



14. R. SALICIFOLIUS, Weinm. Habit and aspect of the 

 preceding but more tufted and ascending; leaves rarely 

 over 2.5 x 15 cm., lanceolate, often falcate, acute at both 

 ends ; pedicels scarcely equalling the fruit or a few in each 



