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 (3x 8 cm.) and one valve almost covered by the 
very large callosity (1.5 to 2x 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. 
b. 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. R. Bertanprert, Meisner. — Erect or quickly ascend- 
ing, glabrous to somewhat papillate; stem rather stout and 
sueculent, 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 to3x3to 4mm., 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 
Avizona ( Palmer, 1876, 638 ; Evans, 1891), New Mexico 
( Wright, 1851, 1781; 1852, 347, 1780), Texas ( Bound. 
Surv. 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. 
