WOOTON AND STANDLEY FLOEA OF NEW MEXICO. 193 



New Mexico: Common except along the eastern side of the State. In cultivated 

 fields and along ditches, from the Lower Sonoran to the Transition Zone. 



Along ditches and streams and in fields wherever crops are cultivated in the State, 

 this is the common dock. It is very resistant to alkali and often occurs in alkali spots. 

 It has been confused with the seacoast plant R. salici/olius Weinm.,' a species of 

 restricted distribution on the Califomian coast. 



9. Rumex obtusifolius L. Sp. PL 335. 1753. Bitter dock. 

 Type locality: "Habitat in Germania, Helvetia, Gallia, Anglia." 



Range: A native of Europe, introduced into many parts of America. 



New Mexico: Kingston ( Metcal/c 109d) . 



A large, thick-stemmed dock, 60 to 90 cm. high, resembling R. occidentalis in general 

 appearance, but with broader leaves. It is readily distinguished from that specica by 

 the structure of the fruiting calyx. In this the valves have 3 to 5 thin, spinelike 

 teeth on each side and smooth callosities, while in R. occidentalis the callosities are 

 absent and the margin of the valves is entire or remotely denticulate. 



10. Biiinex persicarioides L. Sp. PI. 335. 1753. Golden dock. 

 Tyte locality: "Habitat in Virginia." 



Range: Throughout temperate North America. 



New Mexico: Mangaa Springs; mountains southeast of Patterson; Cliff; Dulce 

 Shiprock; Farmington. Along streams and ditches, in the Upper Sonoran Zone. 



4. GONOPYRIIM Fisch. & Mey. 



Low shrub, 1 meter high or less, with stout erect stems; leaves linear, glaucoua, 

 fleshy, jointed to the ocreae; flowers perfect, solitary, on jointed pedicels; sepals 5, 

 white, the 3 inner developing wings at maturity, the 2 outer reflexed; achene elliptic, 

 oblong, brown, pointed at both ends. 



1. GonopyTiim americanum Fisch. & Mey. Mem. Acad. St. Petersb. VI. Sci. 

 Nat. 4': 144. 1845. 



Polygonclla ericoides Engelm. & Gray, Best. Journ. Nat. Hist. 5: 231. 1845. 



Type locality: Texas. 



Range: Georgia to Arkansas, eastern Texas, and central New Mexico. 



New Mexico: Tijeras Canyon (C. R. Ellis). Sandy soil, in the Upper Sonoran 

 Zone. 



This is a most remarkable extension of range for a j^lant not known heretofore from 

 any station west of eastern Texas. It occurs, however, even in the southeast, only 

 locally. Our specimens seem to agree very well with eastern ma.terial, but they are 

 rather fragmentary; perhaps if they were more ample some difference might be dis- 

 covered. 



5. POLYGONUM L. Knotweed. 



Annuals with plender stems branching near the base, prostrate or erect; leaves small, 

 alternate, elliptic to linear-lanCeplate, obtuse or acute, entire, the upper generally 

 much reduced; ocrese hyaline, at length lacerate, not fringed; flowers axillary in short 

 few-flowered clusters, sometimes solitary; calyx of 5 or 6 greenish sepals with white 

 or pink margins; stamens 8 or fewer, at least the inner with dilated filaments; acheneg 

 3-angled, surroimded by the persistent calyx. 



^ See, Fernald M.L. The representatives of Rumex salici/olius in eastern America. 

 Rhodora 10: M? 1908. 



52576°— 15 13 



