SYNOPSIS OF THE FLORA OF COLORADO. 123 



high ; leaves thick, flat, glabrous, petioled, the lowest ovate-subcordate 

 at base, the rest ovate-lanceolate or oblong, acute, attenuate at base ; pani- 

 cle leafy only at base; racemes axillary and terminal, solitary, simple, 

 sessile, the fascicles 3-8-flowered ; flowers perfect, on capillary pedicels 

 jointed at the base and equaling the valves ; valves equal, orbicular, 

 deeply cordate, entire, closely reticulate- veined, destitute of a callus, be- 

 coming greatly dilated. Leaves often 4' long and lJ'-2' wide, on rather 

 short petioles; valves bright rose-color at maturity, 9"-12" in diameter; 

 outer sepals finally deflexed, about equaling the sinus of the valves. 

 Hall & Harbour, 495. 



RUMEX LONGIFOLIUS, DC. Prodr. 14, p. 44. Stout, 3-5 high ; leaves 

 elongated, acute, undulate, the lowest oblong, subcordate, or obtuse at 

 base,6'-15' long^M/ wide, long-petioled, the upper lanceolate, attenuate 

 at each end, and the uppermost linear ; petioles flat above, with a thin 

 linear margin; panicle simple, leafless above, the racemes sessile; valves 

 about 2J" in diameter, broad-ovate, slightly cordate, obtuse, finely reti- 

 culated, subentire, without callosities. Hall & Harbour, 499. Very com- 

 mon on Bear Creek and Horse Shoe Mountain, Coulter. 



RUMEX SALICIFOLIUS, Wemm.Hall & Harbour, 490 and 498. Canon 

 City, Brandegee. Denver, Dr. Smith. Colorado Springs, Porter. Oro 

 City and plains of the Platte, Coulter. 



RUMEX MARITIMUS, L. "Subalpine," Hall & Harbour, 497. Head of 

 Clear Creek, at 10,000 feet altitude, Coulter. Pueblo, Greene. 



RUMEX ACETOSELLA, L. Greeley, Greene. 



POLYGONUM ERECTUM, L. (P. aviculare, L., var. erect urn, Roth.) Wat- 

 son, Rev. ofPolyg., Am. Nat, 1, p. 664. Erect or ascending, glabrous, l -2 

 high or more, pale or yellowish; leaves oblong or oval, 6"-30" long, 

 usually obtuse; flowers mostly l|" long, on more or less exserted pedi- 

 cels; sepals rarely 6; stamens 5-6; acheniuin broadly ovate to lanceo- 

 late, dull and granular or nearly smooth. Around Denver, Dr. Smith. 

 Canon City, Brandegee. ^"orth Park, Hay den. Western's Pass, Coulter. 

 Colorado Springs, Porter. 



POLYGONUM RAMOSissniUM, MX. Colorado Springs, Porter. On the 

 Platte near Denver, Coulter. 



PoLYGONini TENUE, MX. Hall & Harbour, 492 ; Meelian. Colorado 

 Springs, Porter. Sierra Madre Range, Coulter. 



POLYGONUM IMBRICATUM, Nutt. Wateon, 1. c., p. 665. Low, slender, 

 often diffusely branched, l'-S' high; leaves narrowly linear; spikes 

 dense; bracts loosely imbricated, linear or oblong, 2"-4" long, with some- 

 times a narrow, scarious margin, acute; stamens 3 or 5; style one-third 

 as long as the ovary. Alpine and subalpine. Hall c- Harbour, 493; 

 "Blue River, on the western slope of the Rocky Mountains.' 7 



POLYGONUM AMPHIBIUM, L., var. TERRESTRE, Willd. Near Denver, 

 Dr. Smith. Near Colorado Springs, Porter. 



POLYGONUM PENNSYLVANICUM, L. Greeley, Greene.. 



POLYGONUM INCARNATUM, Ell. Cafioii City, Brandegee. Plains of 

 the Platte, Coulter. 



POLYGONUM VIVIPARUM, L. Hall & Harbour. 491. Xear Denver, Dr. 

 Smith. Clear Creek Canon, Coulter. 



POLYGONUM BISTORTA, L. DC. Prod 14, p. 125, Rhizoina thick and 

 twisted; stems annual, very simple; sheaths long and striately nerved; 

 leaves glabrous or puberulent beneath, the lowest cordate obtuse, with 

 a long-winged petiole, the upper subsessile, the highest linear or abor- 



