FLOWERING PLANTS AND FERNS OF ARIZONA 257 



plants were nearly 2 meters high and the basal leaves up to 40 cm. 

 long. 



10. Rumex conglomeratus Murr., Prodr. Fl. Gottingen 52. 1770. 

 Occasional in Maricopa and Pinal Counties, along ditches and 



streams. Here and there in the United States; naturalized from 

 Europe. 



11. Rumex crispus L., Sp. PL 335. 1753. 



Coconino County to the southern border of the State, up to 8,200 

 feet, along streams and ditches. Naturalized in most of temperate 

 North America; native of Eurasia. 



CuiTyleaf dock. The plant is reputed to have medicinal value and 

 is sometimes used as a potherb. 



12. Rumex obtusifolius L., Sp. PL 335. 1753. 



Chiricahua Mountains, 8,000 feet (Blumer 1576), Santa Catalina 

 Mountains, 7,500 feet (Peebles etal. 2564). Extensively naturalized 

 in North America; native of Europe. 



13. Rumex violascens Rech. f ., Repert. Spec. Novarum Regni Veg. 39: 



171. 1936. 



Rumex berlandieri of authors. Not of Meisn. 



Catalpa, Gila County (MacDougal 751), Phoenix, Maricopa County 

 (Tourney 343b), Tucson, Pima County (Tourney 342, 343a), Colorado 

 River Valley (Palmer 638). Texas to California and Mexico. 



14. Rumex fueginus Phil., Univ. Chile An. 91: 493. 1895. 



Rumex persicarioides Pursh, Fl. Amer. Sept. 248. 1814. Not of 

 L., 1753. 



Springerville to Fort Apache, Apache or Navajo County (Eggle- 

 ston 15755). Canada and most of the United States; South America. 



6. OXYRIA. Mountain-sorrel 



Plant resembling a small Rumex but differing in having reniform 

 leaf blades, 4 sepals, 2 stigmas, and a lenticular achene. 



1. Oxyria digyna (L.) Camptdera, Rumex 155. 1819. 



Rumex digynus L., Sp. PL 337. 1753. 



San Francisco Peaks (Coconino County), 10,000 to 12,000 feet, 

 July and August. Greenland to Alaska, south in the mountains to 

 New Hampshire and northern Arizona; Eurasia. 



7. POLYGONUM. 38 Knotweed, smartweed 



Plants herbaceous, annual or perennial, a few species semiaquatic; 

 stems jointed, often swollen at the nodes; leaves alternate, simple, 

 entire, the stipules united in a sheath, this usually cylindric, often 

 lacerate or fringed; flowers small, mostly perfect, in spikes or racemes, 

 or scattered in the leaf axils; pedicels jointed; perianth cleft or parted, 

 with 4 or 5 lobes; stamens 5 to 9; stigmas 2 or 3; achene lenticular or 

 triangular. 



35 Reference: Small, J. K. \ monograph <>k the north American species of nit: gent s poi ygovm 

 Columbia Univ. Dept. Hot. Mem. l: 1-183. 1895. 



