52 NORTH AMERICAN FLORA [VoLumy# 21 
XIII. Semibaccatae. Prostrate perennials, suffrutescent at the base. Leaves alternate, 
short-petiolate, the blades narrow, usually repand-dentate, densely white-furfuraceous be- 
neath, green and glabrate on the upper surface. Flowers monoecious, in axillary or terminal 
glomerules. Fruiting bracts sessile, rhombic, fleshy and red in age, denticulate or entire, the 
sides not appendaged. Radicle lateral. 
39. Atriplex semibaccata R. Br. Prodr. 406. 1810. 
Atriplex denticulata Moq. in DC. Prodr. 132: 97. 1849. 
Atriplex flagellaris Wooton & Standley, Contr. U. S. Nat. Herb. 16: 119. 1913. 
Prostrate perennial, suffrutescent at the base, much branched, the branches slender, 
terete, 3-10 dm. long, whitish, sparsely furfuraceous or glabrate; leaves numerous, alternate, 
short-petiolate, the blades oblong or obovate-oblong, 1-3.5 em. long, 2-9 mm. wide, obtuse or 
acute, cuneate to attenuate at the base, irregularly and remotely repand-dentate, or the 
upper entire, thin, densely and finely white-furfuraceous beneath, usually glabrate and green 
on the upper surface; flowers monoecious, solitary or in small clusters in the axils, the staminate 
clusters usually in terminal glomerules; fruiting bracts sessile, rhombic, 4-5 mm. long, united 
at the base, compressed, the margins denticulate or entire, the sides nerved, not appendaged, 
the bracts becoming red and somewhat fleshy at maturity; seed 2 mm. long, dark-brown, the 
radicle lateral. 
TYPE LOCALITY: Vicinity of Port Jackson, Australia. 
Distrisurion: Australia; naturalized in southern California, Arizona, and southern New 
Mexico. ; 
ILLUSTRATIONS: Bull. U. S. Dep. Agr. Bot. 27: pl. 3, f. 3; F. Muell. Ic. Austr. Sals. pl. 8. 
XIV. Arenariae. Erect or procumbent annuals or perennials, usually densely furfura- 
ceous. Leaves alternate, short-petiolate or sessile, the blades usually narrow, broadest at or 
above the middle, entire or dentate, in one species subhastate and then deeply sinuate-dentate. 
Flowers monoecious, the staminate glomerules axillary or in simple or paniculate spikes. 
Fruiting bracts usually small, sessile or subsessile, broadest near or above the middle, usually 
compressed, dentate, the sides smooth or appendaged. Radicle superior. 
40. Atriplex Lampa Gillies; (Moq. in DC. Prodr. 13?: 110, as 
synonym. 1849) Small, Fl. SE. U.S. ed. 2. 1333. 1913. 
Obione Lampa Mog. in DC. Prodr. 132: 110. 1849. 
Annual (?), much branched, the stems prostrate or ascending, 3-8 dm. long, the branches 
divaricate or ascending, slender, terete, sparsely furfuraceous when young, glabrate in age; 
leaves alternate, short-petiolate, the blades oblong to rhombic in outline, at least the lower 
ones deeply hastate at the base, 1.5-4 cm. long, obtuse or acute at the apex, cuneate or attenu- 
ate at the base, deeply sinuate-dentate with acute or obtuse teeth, thin, densely furfuraceous 
beneath, glabrate on the upper surface, the uppermost blades usually entire, linear or oblong- 
linear; flowers monoecious, the staminate glomerules in slender, naked, mostly interrupted, 
simple or paniculate spikes, the pistillate flowers fascicled in the axils; calyx 5-cleft; fruiting 
bracts short-pedicellate, ovate-rhombic, 6 mm. long and of the same breadth, united to the 
middle, strongly compressed, obtuse, the margins sinuate-dentate, the sides not appendaged; 
seed brown, the radicle superior. 
Tyre LocaLtity: Near Mendoza and San Luis, Argentina. 
DistRipuTion: Argentina; adventive in western Florida and southern Alabama. 
41. Atriplex Serenana A. Nelson, Proc. Biol. Soc. Wash. 17: 99. 
1904. 
Obione bracteosa Durand & Hilgard, Pacif. R. R. Rep. 53: 13. 1858. 
Atriplex bracteosa S. Wats. Proc. Am. Acad. 9: 115. 1874. Not A. bracteosa Trautv. 1870. 
Erect or decumbent annual, 3-10 dm. high, usually much branched, the branches stout, 
obtusely angled, furfuraceous when young, glabrate in age; leaves numerous, alternate, sessile 
or stbsessile, the blades oblong, oval, or lance-oblong, 1.5-8.5 em. long, 0.4-4 cm. wide, 
obtuse or acute at the apex, mucronate, cuneate at the base, acutely dentate, or the upper 
