FIVE NEW SPECIES OF RUMEX. 305 
“R. potyrruizus. Only sparingly leafy, rather slender, 
2 or 3 feet high, the solitary stem from a rather superficially 
seated fascicle of several or many fleshy roots: leaves all of 
narrowly lanceolate or linear-lanceolate outline, mostly 6 to 
8 inches long, on petioles of equal length or shorter, all 
plane or else somewhat crisped toward the base: panicle 
long-and loose but strict,more or less leafy-bracted: pedicels 
rather distinctly subclavate, jointed well above the base: 
valves thin, deltoid-ovate, venulose but scarcely much 
reticulate, the margins dentate. 
Species of dry land habitat mostly along the borders of 
aspen thickets, in southern Wyoming and adjacent Colo- 
: rado, distinguished from all other western species by its 
faseicle of numerous somewhat radiating roots seated near 
the surface of the ground. The specimens before me are 
those collected by myself near Sherman, Wyoming, July, 
'1893, and a very good fruiting one by Mr. Osterhout from 
Lone Pine Creek, Larimer Co., Colo.,22 Aug., 1900. In 
segregating his R. densiflorus Mr. Osterhout seems to have 
taken the present plant for the true R. occidentalis, but it is 
quite as distinet from that as is the other Rocky Mountain 
species; even more so. 
“R. PROcERUS. Very large, the stems often 6 or 8 feet 
high and the lowest leaves 14 feet long exclusive of the 
equally elongated petiole; the blade linear-lanceolate, sub- 
cordate, acutish, the margin inclined to be very full and 
wavy or plicate-undulate: panicle often 2 or 3 feet long, 
rather loose, or sometimes more dense, naked or leafy- 
bracted: pedicels 4 inch long, filiform below, abruptly 
thickened under the calyx, jointed below the middle; 
valves about 3 lines long and as broad, subcordate-orbicu- 
lar, very obtuse, thinnish and reddish in maturity, but 
