178 UNITED STATES AND MEXICAN BOUNDARY. 
pedicellis capillaribus valvas squantibus; valvis lato-cordatis membranaceis integerrimis 
ecallosis. Sandy soils from El Paso to the cafions of the Rio Grande; March—April. Root 
white. Stem 2-3 feet high. ‘‘ Foliage intensely bitter ;’’ Thurber. Lower leaves a foot or 
more long and 2-3 inches wide, somewhat undulate on the margin; upper ones nearly flat. 
Panicle a foot long ; the flowers crowded. Inner sepals of the fructiferous calyx nearly half an 
inch long, roundish-ovate, strongly cordate, of a very thin texture, often rose-colored, slightly 
reticulate-veined, twice as long as the achenium. We cannot refer Rumex to any described 
species. It is nearest R. venosus, but that is a smaller plant, the leaves with a much longer 1, 
and more attenuated base, the panicle lax, and with but few flowers in whorls, and the valves 
are a great deal larger, as well as broader in proportion. 
RuwEx SALICIFOLIUS, Weinm. in Flora, 1821, ex Meisn. in DC. Prodr. 14, pars 1, р. 47. Banks 
of the Rio Grande near Frontera, Texas; April. (No. 1780 and 1781, Wright.) RAA = Rut мж 
Var. DENTICULATIUS: valvulis lato-deltoideis denticulato-serrulatis vix callosis. Near San 
Diego, California; Thurber. Probably a distinct species. 
Rumex MARITIMUS, Linn. | Meisn, 1. с. p. 59. Moist sandy places near San Luis Rey, Calfornia > 
Parry. | 
POLYGONUM AVICULARE, Linn. Sp. p. 519; Meisn. l. c. p. 97. Western Texas ; Wright, No. 1 
1114 and 1775; the latter a tall erect slender form with narrowly lanceolate leaves. 
Рогхвохом PARONYCHIA, Cham. & Schlecht. in Linnea, 3, p. 51. Meisn. 1. с. p. 89. Near | 
Monterey, California ; on the sea beach, April; Parry. San Francisco, Mareh ; Thurber. | 
POLYGONUM CAMPORUM, у BOREALE, Meisn. in Mart. Fl. Bras. fasc. 14, Polyg. p. 22; Ё in 
DC. Prodr. 14, pars 1, p. 87. Dry bed of the Sea Willow, Texas, August; Bigelow. Mouth 
of Los Moros; Schott. (No. 614, Wright.) Stems 3-4 feet long, simple below, apparently 
arising from a creeping rhizoma, the branches elongated, terete, terminating in long slender 
interrupted spikes; bracts 2—4-flowered, the lower ones remote and sometimes with small 
oblong leaves in the axils, the upper somewhat approximated. Flowers on exserted pedicels. 
Perianth pale rose color or white, not punctate. Achenium triquetrous.—Allied to P. scoparium 
of Corsica. 
Potyeonum тезге, Miche, Fl. 1, p. 238; Torr. Fl. N. York, 2, p. 153. Hill sides, Santa 
Rita del Cobra, Aug.; Bigelow. (No. 1776, Wright.) | 
Рогүвохом ACRE, H. B. K.; Meisn. l. е. р. 107. Р. hydropiperoides, Pursh, non Micha 1 
Between El Paso and Doña Ana, on the Rio Grande, April; also on the Mimbres ; Bigelow | 
(No. 1111, Wright.) : 
POLYGONUM HYDROPIPEROIDES, Miche. Fl. 1, p. 289, Meisn. 1. c. р. 103. Brady’s Creek, 
western Texas, October ; Thurber. 
Рогхвохом хоровом, Pers. var. INCARNATUM, Gray, Bot. N. States, ed. 2, p. 372. Р. incarnatum, 
Ell. With the last. Wet ravines below San Elceario on the Rio Grande; Bigelow. Western 
Texas; Thurber. з 
PoLYGONUM PENNSYLYANICUM, Linn. Sp. 1, p. 519; Meisn. l. с. Low grounds near San Elceario 
Texas; Bigelow. Sonora; Thurber, Capt. E. K. Smith. 
POLYGONUM PERSICARIA, Linn.; Meisn. 1. e. Wet places; Valley of the Limpio, ete, 
POLYGONUM AMPHIBIUM, Linn.; Meisn. l. c. Var. TERRESTRE. Presidio del Norte; Bigelow 
(a nearly glabrous form.) Santa Cruz river, Sonora ; Capt. E. K. Smith. (No. 1779, Wright. 
ттт = 
