REVISION OF RUMEX. 89 



show so many intermediate forms and admit of so poor a 

 geographical delimitation, that I cannot find good grounds 

 for recognizing more than a single species. 



A more zigzag plant with broad elliptical rather firm 

 leaves (3x8 cm.) and one valve almost covered by the 

 very large callosity (1.5 to 2 x 3 to 4 mm.), the other two 

 naked, occurs from Sta. Cruz Mountains {Kellogg & 

 McLean, 1876, 597), Sta. Lucia Mountains (Brandegee, 

 1885), and about San Francisco, Cal. ( Vasey, 1880, 545; 

 Mrs. Brandegee, 1882; Blankinship, 1891). Others may 

 consider this to be clearly distinct, but I leave it here for 

 the present. Kellogg & Harford, 1868, 867, judging from 

 a fragment in hb. Gray., may be the same. 



6. Not glaucous : leaves mostly darker green, the lower broadly ovate 

 or widest above the middle, undulate, sometimes cordate or 

 abruptly rounded at base: inflorescence lax. Plants two or three 

 feet high. 



15. E. BERLANDIERI, Meisner. Erect or quickly ascend- 

 ing, glabrous to somewhat papillate; stem rather stout and 

 succulent, mostly reddish, subsimple, zigzag above ; leaves 

 becoming 4x20 cm., spatulate to oblanceolate, obtuse; 

 panicles terminal and axillary, leafless except for the 

 main axis, the branches divergent or ascending; whorls 

 dense, remote except above ; pedicels rather stout, about 

 as long as the fruit, tumidly jointed below the middle; 

 valves 2.5 to 3 x3 to 4 mm., subtriangular, erose or mostly 

 with three or four very evident teeth on each side 

 towards the base ; callosities mostly 3, oblong, wrinkled on 

 the sides below, unequal, the larger .7 mm. wide, extending 

 beyond the middle of the valve; achene 1x2.3 mm. 

 DC. Prod. xiv. (1856), 45. Arizona and New Mexico 

 through Texas to Mexico. Specimens examined from 

 Arizona (Palmer, 1876, 638 ; Evans, 1891), New Mexico 

 ( Wright, 1851, 1781 ; 1852, 347, 1780), Texas (Bound. 

 8urv. 1173; Lindheimer, 1843; Vasey, 1881; Havard, 

 1881, 111; Miss Croft, 115), and Mexico (Mercier, 1828, 

 115; Berlandier, 885, and 1831, 2315; Palmer, 1880, 

 1182). Plate 27. 



