168 CHENOPODIACEAE (GOOSEFOOT FAMILY) 



14. Atriplex Nuttallii Wats. Proc. Am. Acad. 9: 116. 1874. Perennial, 

 with more or less woody base, diffusely branched, 2-5 dm. high, greenish but 

 moderately appivsscd scurfy: leaves oblong-spatulate to narrowly oblancep- 

 itiiv: >t animate flowers in dense leafless spikes; pistillate clustered in 

 the 'axils :uul in terminal spikes: fruiting bracts ovate, strongly convex, 

 united, with toothed margins and irregularly crested or tubercled sides. 

 (.1. oblanceolato Rydb. 1. c. 403.) The "Great Plains;" on alkali free or 

 moderately saline soil. 



1 \a. Atriplex Nuttallii corrugata (Wats.) A. Nels. Lower and more closely 

 branched: leaves smaller and more crowded: fruiting bracts obovate and 

 smaller. (.1. corrugata Wats. Bot. Gaz. 16: 345. 1891.) Arid plains; Colorado. 



i:,. Atriplex pabularis A. Nels. Bull. Torr. Bot. Club 25: 203. 1898. Closely 

 si>d white-scurfy, the slender branches tufted on a lignescent base, mostly 

 erect, 2 '^ dm. high, usually but slightly branched: leaves oblong to almost 

 linear. 2-5 cm. long: flowers panicled, densely clustered: fruiting bracts united, 

 oblong-cuneate, decidedly compressed, 4-5 mm. long, almost as broad at the 

 o-toothed summit, their sides not muricate. Moist strongly alkaline soil; 

 Wyoming and south into Colorado. 



15a. Atriplex pabularis eremicola (Osterh.) A. Nels. Base more shrubby, 

 more divaricately branched: fruiting bracts often broader and not rarely 

 with accessory teeth on the rounded summit. (A. eremicola Osterh. Bull. 

 Torr. Bot. Club 25: 284. 1898.) Same range as the species. 



9. GRAYIA H. & A. 



Slightly scurfy or mealy and often spiny undershrubs, with entire alternate 

 leaves, small flowers in axillary clusters or terminal spikes. Flowers dioecious; 

 calyx mostly 4-parted. Fruiting bracts completely united, obcompressed, 

 orbicular-flattened, entire and wing-margined, the sides naked and somewhat 

 reticulate- veined. Radicle inferior. 



1. Grayia spinosa (Hook.) Moq. in DC. Prodr. 13 2 : 119. 1849. Erect, 

 diffusely branched, 3-8 dm. high, the branchlets frequently spinescent: 

 leaves rather fleshy, glabrous or at first with the young branches somewhat 

 mealy, oblanceolate, spatulate or obovate, 10-25 mm. long, obtuse or acute, 

 narrowed at base and sometimes petioled: staminate flowers in axillary clusters, 

 the pistillate mostly spicate: fruiting perianth 5-10 mm. in diameter, sessile, 

 smooth, emarginate, thin, white or pinkish, the seed usually central. G. 

 polygaloides H. & A. Alkaline soil; throughout our range and westward. 



2. Grayia Brandegei Gray, Proc. Am. Acad. 11: 101. 1876. Lower and 

 unarmed, more mealy: leaves linear-spatulate : fruiting bracts smaller, slightly 

 mealy, retuse at base, sometimes 3-winged, sessile: style short, included. 

 Southwest Colorado. 



10. SUCKLEYA Gray 



A nearly glabrous annual, with branching prostrate stems, and suborbicular 

 leaves on long petioles. Monoecious, the flowers in axillary clusters. Peri- 

 carp naked, subhastate, with crested margins and 2-toothed apex. 



1. Suckleya Suckleyana (Torr.) Rydb. Mem. N. Y. Bot. Card. 1: 133. 1900. 

 Smooth, or somewhat scurfy; the stems prostrate or ascending, 2-3 dm. long: 

 25 mm. long, on somewhat longer slender petioles, acutely re] Kind- 

 dentate: flowers in axillary clusters, the staminate above: calyx parted to 

 the base: fruiting bracts 5-6 mm. broad, flattened, surrounded ' by a narrow 

 crenate-denticulate margin: seed large, filling the cavity. S. petiolari* Gray. 



Throughout our range but rare. 



11. EUROTIA Adans. 



Low pubescent undershrubs with alternate entire leaves and monoecious 

 or dioecious flowers in small axillary and somewhat spicate clusters. Calyx 



