360 . BOTANICAL GAZETTE [November 



Atriplex truncata (Torr.) Gray, Proc. Am. Acad. 8:398. 





If this species, like A, arge?itea,ht confined within the limits of \ 



the original description, it becomes quite local and meagerly 



represented,* Several forms, differing among themselves as to 



habit and size, and even to some extent as to fruit characters, 



seem best to leave united with it. A year ago the writer 



marked some of these forms for specific rank, and (unfortunately) 



went so far as to distribute two of them with herbarium names, 



'' inedy The numbers so distributed are 8141 and 8170. 



Including these forms its range now seems to be from W. 



Nebraska to Oregon. 



Atriplex Suckleyana (Torr.) Rydb. Mem. N. Y. Bot. Gard. 

 1:134. — The original range, **upper Missouri and head-waters 

 of the Yellowstone," may have added to it '*near the North 

 Platte and some of its tributaries." 



Atriplex spatiosa, n. sp. — A large erect annual, freely and 

 divergently branched, often i™ high, greenish-gray, minutely 

 scurfy throughout : leaves ovate 2-5 ^"^ long, coarsely and irreg- 

 ularly toothed, cuneate at base, rarely subhastate, nearly sessile, 

 acute at apex with a minute cusp ; the floral gradually reduced, 

 becoming lanceolate and bract-like : monecious, androgynous at 

 least above, the flowers in small axillary clusters and in ebrac- 

 teate terminal spikes: calyx deeply 5-cleft: fruiting bracts 

 small, rarely 5 ""^ long, ovate-triangular or orbicular, appressed, 

 free above, with green border, hastately toothed near base or 

 with several smaller teeth, the back crested with a semicircle 

 (usually) of small slender green appendages.' 



This species came under my observation some three years ago, but the 

 specimens secured happened to be found on loose banks and raihoad grades, 

 and it was suspected that it might be an introduction. It is proposed even 

 now with some hestitation but with more confidence, since in the Herbanum 

 of the Missouri Botanical Garden is found a specimen by Dr. Vasey, no. 4o7 

 (Powell's Colo. Expd. 1868), which undoubtedly is the same thing, though it 

 was distributed as Obione argentea. Two others occur which are probably 

 the same, namely, Harden, Ft. Pierre, 1853; ^.nd ////r^^(?^/t 439» Kansas, 

 1895; these also as A. argentea. The relationship is nevertheless rather 

 with A. rosea L. 



The type number is 8140. Granger, Wyoming. Aug. I900; Elias Nelson 

 737, Laramie, Wyoming, Sept, I901, may be named as the co-type. 



