358 BOTANICAL GAZETTE [November 



Atriplex eremicola G. E. O., Bull. Torr. Bot. Club 25:284, 

 is very closely allied to the preceding, distinguished principally 

 by a more branched, woody, and decumbent base.^ It may have 

 to take varietal or even lower rank. 



Atriplex expansa Wats, Proc. Am. Acad. 9: Ii6. — A very 

 large part of the specimens found under this name are quite dis- 

 tinct from typical A, expaiisa. In the collections of the Missouri 

 Botanical Garden only two were found to be true A. expaiisa, 

 while there were several which are now named as below. The 

 typical form apparently extends westward from New Mexico on 

 either side of the ** boundary." It Is a much larger plant, 

 "growing in intricately entangled masses 6-10 feet in diameter 

 and 4-6 feet high." Stems and branches have fairly long inter- 

 nodes, the spikes interrupted, leafless toward the apex. 



Atriplex philonitra, n. sp. — Annual, silvery-white, with a dense 

 scurfiness, freely branched throughout, widely spreading and 

 forming low tangled masses, 2-4 ^^ high: leaves in young plants 

 from broadly ovate to orbicular, ^-nerved, 1-3''™ long, on peti- 

 oles mostly exceeding the leaves ; in older plants very numerous, 

 rhombic-ovate or subcordate, on the branches becoming acute, 

 gradually smaller and bract-like: monoecious, androgynous and 

 also with unisexual clusters, floriferous and leafy -bracted through- 

 out, the crowded clusters at the closely approximated nodes of 

 the spike-like branches : calyx small, only the tips of the sepals 

 free : anthers large : fruiting bracts suborbicular, about 5 

 broad, barely united above by the irregularly toothed narrow 

 margins, the backs appendaged by short, thick, flat processes : 

 radical superior. 



This has heretofore been confused with the preceding, from which the 

 three forms of flower clusters on the same plant, and the crowded bracteate 

 spikes easily distinguish it. The axial branch of each plant is usually wholly 

 staminate. Most of the specimens collected in the Rocky mountains north 

 of New Mexico and ticketed A. expansa will be found to belong here. I 

 make the type of the species my no. 8171, Laramie river, Wyoming* Sept. 

 igoo. 



Atriplex argentea Nutt. Gen. 1:198.- — A. voluta?is Aven Nel- 



'For distinctions in seed (fruit) characters see ** Seeds of commercial saltbushes, 

 Bull. 27, U. S. Dept. of Agric, Div. of Bot. 



mm 



5? 



