GOOSEFOOT FAMILY 247 



nearly free, linear-lanceolate, becoming 8-12 mm. long, strongly 3-nerved, some- 

 what hastately lobed. Obione phyUostegiaTorr. Enclolepis phyllostegia Rydb., in 

 part. A. Draconis M. E. Jones. Valleys and foot-hills: Utah Xev. Son 

 Submont. My-Jl. 



5. A. subdecumbens M. E. Jones. Stem 5-20 cm. long, much branched 

 at the base, mealy throughout; leaves barely petioled; blades ovate to lanceo- 

 late, 12-18 mm. long, entire, thin; flower-clusters small, axillary; fruiting bracts 

 about 2 mm. long, obscurely dentate on the margin. Gravelly meadows: Utah. 

 Mont. Au. 



6. A. saccaria S. Wats. Stem ascending, 1-1.5 dm. high, diffusely branched, 

 densely scurfy; leaves short-petioled or sessile; blades 1-2 cm. long; flower- 

 clusters axillary; fruiting bracts about 3 mm. long, cuneate, reticulate on the 

 sides. A. cornuta M. E. Jones. Arid regions: Nev. Wyo. X.M. Ariz'. 

 Son.' 



7. A. truncata (Torr.) A. Gray. Stem stout, 3-10 dm. high, sparingly 

 branched; leaves sessile or the lower short-petioled; blades broadly triangular- 

 ovate, 2-4 cm. long, truncate or subcordate at the base; inflorescence leafy; 

 bracts 3 mm. long; faces not reticulate and rarely tubercled. A. Nelsonii M. E. 

 Jones. Alkaline flats: Mont. N.M. Calif. B.C. Plain Submont. Jl-S. 



8. A. Wolfii S. Wats. Stem 1-2 dm. high, slender, branching from the base, 

 scurfy; leaves sessile, linear, 1-1.5 cm. long, acute, scurfy; flowers in small axil- 

 lary clusters (monoecious); fruiting bracts 11.5 mm. long, cuneate-obovate; 

 summit foliaceous, 3-toothed. Alkaline flats: Wyo. Colo. Utah. Plain- 

 Submont. Je-S. 



9. A. Caput-Medusae Eastw. Stem with several, erect branches from the 

 base, 4-5 dm. high, much branched; leaves petioled; blades vertical, thin, del- 

 toid or hastate; fruiting bracts orbicular, becoming hard, 4-5 mm. long, thickly 

 beset with flat horny acuminate processes. River banks: se Utah sw Colo. 

 N.M. Son. 



10. A. rosea L. Stem erect, freely branching, often 1 m. high; leaf-blades 

 ovate, 2-5 cm. long, coarsely and irregularly toothed; flowers in axillary clusters, 

 staminate and pistillate mixed; fruiting bracts about 5 mm. long, hastately 

 toothed near the base, the faces with slender green appendages. A. spatiosa 

 A. Xels. Alkaline flats and railroad embankments: Wyo. Kans. Chihuahua 

 -Calif. Wash.; N.Y.Fla.; adv. from the Old World. " PlainSon. Au-S. 



11. A. expansa S. Wats. Stem divaricately branched, 3-18 dm. high; leaves 

 thin, triangular-hastate; pistillate flowers in axillary clusters; fruiting bracts 

 coarsely toothed on the margins and somewhat tuberculate on the faces. Alka- 

 line soil: Tex. (? Colo.) Calif. ;n Mex. Son. Jl-O. 



12. A. argentea Xutt. Stem divaricately branched, angled, 2-10 dm. high; 

 leaf-blades ovate, triangular-ovate, or subrhombic, 2-5 cm. long; pistillate 

 flowers in axillary clusters; fruiting bracts suborbicular, usually deeply toothed 

 and with projections on the faces. A. rolutans A. Xels. SALT-BUSH. Alkaline 

 flats: Sask.X.D. Colo. B.C. Plain Son. Jl-S. 



13. A. Powellii S. Wats. Stems 2-5 dm. high, freely branched; leaves 

 silvery white, petioled; leaf -blades 0.8-2 cm. long; flowers in small clusters in 

 the axils, the staminate and pistillate usually mixed or the staminate ones above; 

 fruiting bracts suborbicular, about 5 mm. broad, irregularly toothed; the faces 

 with short thick appendages. A. philonitra A. Xels. Alkaline flats and dry 

 lakes: Alta S.D. X.M. Ariz. Mont. Son. Submont. Jl-S. 



14. A. Rydbergii Standl. Stem erect, branched, 2-4 dm. high, subterete; 

 leaves petioled or the upper subsessile; blades ovate or rhombic-ovate to elliptic, 

 1.5-3.5 cm. long, obtuse or acute at the apex, cuneate at the base, entire, gray- 

 ish; pistillate flowers solitary or in small clusters in the axils, sometimes mixed 

 with staminate ones, the staminate ones mostly in interrupted terminal spikes; 

 fruiting bracts flabelliform, deeply and coarsely dentate on the margins. Dry 

 roadsides and hills: se Utah. Son. Jl. 



