Part 1, 1916] CHENOPODIACEAE 13 
the fruit; stamens exserted; styles short; pericarp green, adherent; seed horizontal, 1.2-1.5 
mm. broad, dull, finely puncticulate, the margin acute. 
TYPE Locality: Europe. 
DistRiBuTION: Europe, Asia, and Africa; adventive and established nearly throughout North 
America from southern Canada to Guatemala and the West Indies. 
_ _ILwustrations: Jacq. Ic. Pl. Rar. pl. 345; Fl. Dan. pl. 2048; E. & P. Nat. Pfl. 318: f. 27, D; 
Britt. & Brown, Ill. Fl. f. 1367; ed. 2. f. 1686; Engl. Bot. pi. 1722; Sturm, Deuts. F1. 75: pl. 5; 
Reichenb. Ic, Fl. Germ. 24: pl, 245, f. 1-5; Magyar Bot. Lap. 2: pl. 8, f. 32; lowa Geol. Surv. Bull. 
4: f. 269, C; Moss, Cambr. Brit. Fi. pl. 162; G. T. Stevens, Ill. Guide pl. 35, f. 10; Hegi, Ill. Fl. f. 
544, a-e; Benth. Ill. Handb. f. 841; Fiori & Paol. Ic. Fl. Ital. f. 1011; Pratt, Fl. Pl. Great Brit. gl. 
176, f. 2; Bull. Mich. Exp. Sta. 267: f. 52. 
II. Polysperma. Plants glabrous throughout. Leaf-blades entire. Glomerules of 
flowers spicate or racemose, present in the axils of even the lowest leaves. Perianth spreading 
in age. Pericarp free, green. Seed horizontal, shining. 
4. Chenopodium polyspermum L. Sp. Pl. 220. 1753. 
Atriplex polysperma Crantz, Inst. 1: 207. 1766. 
Chenopodium marginatum Spreng.; Hornem. Hort. Hafn. 1: 256. 1813. 
Chenopodium acutifolium Smith, Comp. Fl. Brit. 42. 1816. ‘ 
Chenopodium polyspermum obtusifolium Gaud. Fi. Helv. 2: 258. 1828. 
Chenopodium polyspermum. acutifolium Gaud. Fl. Helv. 2: 259. 1828. 
Oligandra atriplicoides Less. Linnaea 9: 199. 1834. 
Lipandra atriplicoides Mog. Chenop. Enum. 19, 1840. 
Gandriloa atriplicoides Steud. Nom. Bot. ed. 2.1: 662. 1840. 
Vulvaria polysperma Bubani, Fl. Pyren. 1: 175. 1897. 
Glabrous, erect or ascending annual, 3-9 dm. high, much branched, the lower branches 
often decumbent, the others ascending, stout; petioles slender, half as long as the blades or 
shorter; leaf-blades ovate to oval or elongate-oval, 3-8 cm. long, obtuse to rounded at the 
apex or rarely acute, rounded to cuneate at the base, entire, rather thin, bright-green, the 
upper blades sma'ler, narrower, often acute; flowers in dense spikes or in loose cymes, these 
terminal and present in the axils of most of the leaves; calyx deeply cleft, the lobes oblong to 
lance-oblong, obtuse or acute, green, spreading in age; pericarp thick, free; seed horizontal, 
about 1 mm. broad, slightly flattened, nearly smooth, black, shining, the margin rounded. 
Type LocaLity: Europe. 
DistRIBUTION: Europe and northern Asia; sparsely adventive in the United States from Maine 
to New Jersey and Tennessee, and in Oregon. 
ILLUSTRATIONS: Sturm, Deuts. Fl. 75: pl. 12; Engl. Bot. pl. 1481; Fl. Dan. pl. 1153; Lobel, 
Te. 1: 256, f. 1; Britt. & Brown, Il. Fl. f. 1362; ed. 2. f. 1682; Leighton, Fl, Sbropsh. 9l. 5; 
Reichenb. Ic. Fl. Germ. 24: pl. 236; Moss, Cambr. Brit. Fl. pl. 156; Hegi, IN. Fi. f. 543, k-0; Pratt, 
Fl, Pl. Great Brit. pl. 175, f. 4; Benth. Il. Handb. f. 836; Fiori & Paol. Ic. FI. Ital. f. 1008; 
G. T. Stevens, Il. Guide #l. 35, f. 4; Bull. Mich. Exp. Sta. 267: f. 53. : 
III. Hybrida. Plants tall, glabrous except on the younger parts, these sparsely farinose 
with inflated whitish trichomes. Leaf-blades, at least the lower ones, cordate or subcordate 
at the base, bright-green. Glomerules of flowers spicate or cymose. Calyx-lobes-rounded 
on the back, imperfectly enclosing the fruit. Pericarp adherent to the seed. Seed horizontal. 
5. Chenopodium hybridum 1. Sp. Pl. 219. 1753. 
Atriplex hybrida Crantz, Inst. 1: 207. 1766. 
Chenopodium angulosum Lam. Fl. Fr. 3: 249. 1778. 
Chenopodium stramoniifolium Chev. Fl. Paris 2: 383. 1827. 
Chenopodium hybridum cymigerum Neilr. Fl. Wien 190. 1846. 
Vulvaria stramoniifolia Bubani, Fl. Pyren. 1: 177. 1897. 
Botrys hybrida Nieuwl. Am. Midl. Nat. 3: 275. 1914. ° 
Erect, bright-green annual, 3-14 dm. high, glabrous except about the inflorescence, 
usually much branched, the branches slender, ascending or spreading; petioles slender, half 
as long as the blades or shorter; leaf-blades broadly ovate to triangular-ovate, 7-22 cm, long, 
long-acuminate, rounded or usually subcordate at the base, sinuate-angled, with usually 2-4 
large triangular acute teeth on each side, the upper blades narrower and often entire; flowers 
sessile, in small glomerules, these arranged in dense slender naked paniculate spikes or in 
loose dichotomous cymes, the branches more or less farinose; calyx green or rarely purplish, 
farinose, deeply cleft, the lobes oblong or oval, obtuse or emarginate, rounded on the back, 
