MEMOIRS OP^ THE NEW YORK BOTANICAL GARDEN. I3I 



CHENOPODIACEAE. 



Chenopodium album L. Sp. PI. 219 [Man. R. M. 307 ; 111. Fl. i: 



570; Bot. Cal. 2: 46; Wats. Rev. Chen. 96].* 



Common in waste places ; introduced. 



Montana: Mead's Springs, July 27, 1871, Robert Adams (Hay- 

 den's Surv.) ; Emigrant Gulch, Aug. 23, 1897, Rydbcrg & Bes- 

 sey,3945 and jp^;. 



Yellowstone Park: Mammoth Hot Springs, 1894, F. H. 

 Biirglehoiis ; Upper Geyser Basin, Aug. 8, 1897, Rydbcrg d- Bes- 

 sey, 3946. 



Chenopodium leptophyllum (Moq.) Nutt. ; DC. Prod. 13- : 71 as 



synonym under Chenopodium album leptophylhim Moq. [Man. R. 



M.".3o8; 111. Fl. i : 571 ; Bot. Cal. 2 : 47 ; Wats. Rev. 94]. 



In old fields, on roadsides, etc., up to an altitude of 2500 m. 



Montana: Fridley, 1887, Tzceedy, 2/6: Bull Mountain, 1882, 

 Canby . 



Yellowstone Park : Yellowstone Lake, 1885, Tweedy, 462. 



* Chenopodium atrovirens. 



Stem 3-5 dm. high, branched, striate, obtusely angled ; leaves 

 slender-petioled, broadly ovate, obtuse, truncate, or the upper mucro- 

 nate, entire, sometimes slightly hastately lobed at the base, three- 

 nerved, very dark green, only sparingly meah', rather thick and 

 somewhat fleshy, 1-3 cm. long and 5-15 mm. wide; flowers in small 

 spike-like glomerules in the axils of the leaves and in compound 

 interrupted spikes at the ends of the branches, very small and spar- 

 inglv meal}' ; seeds lenticular, i mm. long, almost black, smooth, 

 easily separating from the pericarp. 



It much resembles C. oli'dum, but differs in the darker green color 

 of the leaves and stem, the sparser mealiness, the smaller flowers 

 and the easily separated seeds, which are not pitted as are those of 

 C. olidum. The type was growing on a dry hillside together with 

 Mentzelia tenerrima and Syinp/iortcarpos vaccinioides, under some 

 trees of Pseudotsuga mucronata. 



Montana: Foothills of Electric Peak, August 18, 1897, Rydberg 

 & Bessey, 3948 (type). 



Yellowstone Park: Stevenson Island, 1885, Tweedy, 439. 



* Watson, Rev. N. A. Chenopodiaceae in Proc. Am. Acad. 9: 82-126. 



