1921] Smiley: Flora of the Sierra Nevada of California 167 



3. KUMEX 



Flowers perfect in a leafy-bracted compact raceme; leaves abruptly contracted 

 to a winged petiole; callus grains wanting or the sepal merely ridged 

 1. R. hesperius 



Flowers monoecious in slender, loose, leafless racemes; leaves entire, linear, 



attenuate to a narrow petiole; callus grains minute ox wanting 



2. R. paucifolius 



1. Rumex hesperius Greene, Pitt., vol. 4, p. 234. 1901. 



B. salicifolius Weinm. var. montigenitus Jepson, Fl. Calif., vol. 1, p. 386. 

 1914. 



Type locality. — "Near Bingen, Washington." 



Range. — Pacific Coast. 



Zone. — Transition to Hudsonian. 



Specimens examiined. — Carson Spur, Alpine County, 8,500 feet, 

 Hansen 752; Upper Tuolumne River, 9,000 feet, Brewer 1757. 



Our high mountain Dock differs from B. salicifolius Weinm. {in 

 Flora, vol. 4, p. 28. 1821), which was described from "California" 

 in the usually almost complete absence of grains upon the sepals ; from 

 R. Mexicanus Meissn. it differs, besides lacking the well developed 

 grains of that species, also in the smaller panicle. I have seen no 

 authentic material of R. suhalpinus Jones (Proc. Calif. Acad. II, vol. 

 5, p. 720. 1895), which is ba.sed upon material collected by Jones 

 (No. 5954) on "Brigham Peak, near Maryville, Utah, 10,800 ft. alt."; 

 from character it would seem to approach R. mexicanus Meissn. {in 

 DC. Prodr., vol. 14, p. 45. 1856), a species ranging from British 

 America throughout the Rockies to the mountains of central Mexico 

 (see Fernald : "The representatives of Rumex salicifolius in Eastern 

 North America": Rhodora, vol. 10, p. 17. 1908). 



2. Rumex paucifolius Nutt., in Wats., Bot. King's Exped., p. 314. 



1871. 



B. Geyeri (Meissn.) Trel., Eep. Mo. Bot. Gard., vol. 3, p. 78. 1892. 



B. Engelmanni var. Geyeri Meissn., in DC. Prodr., vol. 14, p. 64. 1856. 



Type locality. — "Near Flat-Head river, in moist places by streams 

 (Montana)." 



Range. — British Columbia south to California and Colorado. 



Zone. — Canadian. 



Specimens examined. — Soda Springs, Yosemite, Brewer 1696; 

 Tuolumne meadows, 8,600 feet, R. A. Ware 2662c; Yosemite Valley, 



