12 NORTH AMERICAN FLORA [VoLuME 21 
of flowers in cymes or spikes; calyx-lobes carinate or rounded on the back, imperfectly enclosing 
the fruit. Pericarp adherent to the seed, green. Seed horizontal, dull or lustrous. 
1. Chenopodium mexicanum Mog. in DC. Prodr. 13%: 70. 1849. 
Erect or ascending annual, 2-5 dm. high, branched throughout, the branches very stout, 
spreading or ascending, sparsely farinose when young, becoming glabrate; petioles stout, half 
as long as the blades or shorter; leaf-blades triangular or triangular-rhombic, 3-8 cm. long, 
2.5-5 cm. wide, obtuse at the apex, truncate or shortly and abruptly cuneate at the base, 
coarsely and irregularly sinuate-dentate, bright-green on the upper surface and sparsely farinose 
or glabrate, lustrous, densely white-farinose beneath; flowers sessile in small glomerules, these 
atranged in slender interrupted paniculate spikes, the whole inflorescence consisting of a naked 
terminal pyramidal panicle 4-10 cm. long; calyx glabrous, green, deeply cleft, the lobes oblong 
or oval, rounded or obtuse at the apex, rounded on the back, imperfectly enclosing the fruit; 
stamens usually 5; style-branches short; pericarp green, slightly adherent; seed horizontal, 
i mm. broad, puncticulate, shining, the margin acute. 
Type Locality: Near the City of Mexico, Mexico. 
DistRIBUTION: Vicinity of the type locality. 
2. Chenopodium urbicum L. Sp. Pl. 218. 1753. 
Atriplex urbica Crantz, Inst. 1: 206. 1766. 
Chenopodium deltoideum Lam. FI. Fr. 3: 249.. 1778. 
Chenopodium rhombifolium Muhl.; Willd. Enum. 288. 1809. 
Chenopodium intermedium Mert. & Koch, Deuts. Fl. 2: 297. 1826. 
Chenopodium urbicum intermedium Koch, Syn. Fl. Germ. 605, 1837. 
Chenopodium urbicum rhombifolium Moq. Chenop. Enum. 32. 1840: 
Vulvaria deltoidea Bubani, Fl. Pyren. 1: 176. 1897. 
Erect annual, 3-10 dm. high, simple or sparsely branched, the'branches ascending, stout, 
glabrous; leaves numerous, the petioles equaling or shorter than the blades; leaf-blades tri- 
angular to rhombic-ovate, 2.5-5.5 cm. long, the upper smaller, acute or obtuse, bright-green, 
lustrous on the upper surface, more or less farinose when young but soon glabrate, the upper- 
most blades usually entire; flowers sessile in small glomerules, these sessile in slender, elongate, 
interrupted, simple or paniculate, nearly naked spikes; calyx deeply cleft, the lobes obovate, 
rounded or emarginate at the apex, green, imperfectly enclosing the fruit, rounded on the 
back; pericarp green, slightly adherent; seed horizontal, 0.7-1 mm. broad, brownish-black, 
smooth, shining, the margin obtuse. 
Type Locatity: Northern Europe. . 
DistRIBUTION: Europe and northern Asia; sparsely adventive from Nova Scotia to Ontario, 
Missouri, and Maryland. 
ILLUSTRATIONS: Sturm, Deuts. Fil. 75: ol. 3, 4; Fl. Dan. pl. 1148; Britt. & Brown, Ill. Fl. f. 
1366; ed. 2. f. 1685; Sv. Bot. pl. 459; Engl. Bot. pl. 717; Reichenb. Ic. Fl. Germ. 24: pl. 246, pl. 
247, f. 1-3; Moss, Cambr. Brit. Fl. pl. 163, 164; Hegi, Ill. Fl. f. 544, gt; Benth. I. Handb. f. 840; 
Fiori & Paol. Ic. Fl. Ital. f. 1012; Pratt, Fl. Pl. Great Brit. pl. 176, f. 1; Bull. Mich. Exp. Sta. 
267: f. 54. 
3. Chenopodium murale L. Sp. Pl. 219. 1753. 
Atriplex muralis Crantz, Inst. 1: 206. 1766. 
Chenopodium guineense Jacq. Coll. 2: 346. 1788. 
Chenopodium carthagenense Zuccagni, in Roem, Coll. 133. 1806. 
Chenopodium murale albescens Mog. Chenop. Enum, 32. 1840. 
Chenopodium murale carthagenense Mog. in DC, Prodr. 137: 69. 1849. 
Vulvaria trachiosperma Bubani, Fl. Pyren. 1: 177. 1897. 
Chenopodium murale spissidentatum Murr, Magyar Bot. Lap. 2: 11. 1903. 
Erect or ascending annual, 2-6 dm. high, simple or usually much branched from the base, 
the branches stout, ascending, glabrous or sparsely farinose; petioles slender, equaling or 
shorter than the blades; leaf-blades ovate or ovate-rhombic, 3-8 cm. long, 2.5-5 cm. wide, 
acute or obtuse, subtruncate to cuneate at the base, irregularly sinuate-dentate to laciniate- 
serrate, with obtuse or acute teeth, glabrate or often copiously farinose, at least beneath, 
lustrous on the upper surface; flowers sessile, more or less farinose, the small glomerules ar- 
ranged in lax or dense, axillary and terminal, mostly leafless cymes or panicles; calyx deeply 
cleft, the lobes oblong, obtuse, herbaceous, green, obscurely carinate, incompletely enclosing 
