26 NORTH AMERICAN FLORA [VoLuME 21 
41. Chenopodium dissectum (Mogq.) Standley. 
Ambrina dissecta Moq. Chenop. Enum. 38. 1840. 
Chenopodium bipinnatifidum Moric.; Moq. in DC. Prodr. 132: 76, 1849. 
Sweet-scented erect annual, 1-3 dm. high, simple at the base, much branched above, the 
branches stout, ascending or spreading, densely and very shortly glandular-villous ; petioles 
half as long as the blades or shorter; leaf-blades 1.5-3.5 em. long, about 1 cm. wide, pinnatifid 
nearly to the midrib into linear segments, these entire, subpinnatifid, or dentate, about 1 mm. 
broad, obtuse or acutish, densely glandular-scaberulous; flowers sessile or pedicellate, solitary, 
in dense, terminal and axillary, few-flowered cymes, these naked or nearly so; calyx 1 mm. 
broad, deeply 5-cleft, the lobes carinate, acute, densely glandular, enclosing the fruit; pericarp 
subadherent; seed horizontal, 0.6 mm. broad, nearly black, dull, granulate, the margin obtuse. 
TYPE LocaLity: Mountains near the City of Mexico. 
DisTRIBUTION: Coahuila to central Mexico. 
42. Chenopodium Botrys L. Sp. Pl. 219. 1753. 
Atriplex Botrys Crantz, Inst. 1: 207. 1766. 
Boirydium aromaticum Spach, Hist. Vég. 5: 299. 1836. 
Ambrina Botrys Moq. Chenop. Enum. 37. 1840. 
Chenopodium boiryoides Raf.; Moq. in DC. Prodr. 13?: 75, assynonym. 1849. 
Chenopodium botryoides gracile Raf.; Moq. in DC. Prodr. 13?: 75, as synonym. 1849. 
Chenopodium Botrys gracile Moq. in DC. Prodr. 137: 75. 1849. 
Roubieva Botrys Fuss, Fl. Transsytv. 552. 1866. 
Chenopodium botrydium St.-Lag. Ann. Soc. Bot. Lyon 7: 122. 1880. 
Vulvaria Botrys Bubani, Fl, Pyren. 1: 177. 1897. 
Botrys aromatica Nieuwl. Am. Midl. Nat. 3: 275. 1914. 
Sweet-scented erect annual, 2-6 dm. high, densely glandular-viscid throughout, much 
branched, the branches ascending; petioles one fourth to one half as long as the blades; leaf- 
blades oblong or oval in outline, 1-5 cm. long, sinuate-pinnatifid, the lobes obtuse or rounded, 
entire or sinuately lobed, truncate to cuneate at the base, the blades of the inflorescence re- 
duced, spatulate to lanceolate, often entire; inflorescence of numerous densely many-flowered 
cymes, the whole finally forming a narrow, elongate, nearly naked panicle; flowers subsessile, 
1 mm. long; calyx cleft nearly to the base, the lobes oval or oblong, acute or acuminate, densely 
glandular-pubescent, imperfectly enclosing the fruit at maturity; pericarp thin, whitish, 
firmly attached to the seed; seed subglobose, 0.6 mm. in diameter, dark-brown, dull, vertical 
or horizontal. : 
Type LocaLity: Southern Europe. . . 
DistRIBUTION: Europe, Asia, and Africa; naturalized as a weed or escaped from cultivation in 
nearly all parts of the United States and southern Canada, and in South America. 
ILLUSTRATIONS: Blackw. Herb. pl. 314; Sibth. Fl. Graeca pl. 253; Guimp. & Schl. Abb. Fit. 
Boruss. pl. 270; Sturm, Deuts. Fl. 75: pl. 15, 16; T. Nees, Gen. Fl. Germ. Dicot. 1: gl. 56, f. 14, 15; 
E. & P. Nat. Pfl. 3: f. 25, H, J; Britt. & Brown, Ill. Fl. f. 1371; ed. 2. f. 1690; Karst. Deuts. Fl. f. 
311, 7-11; Fiori & Paol. Ic. Fl. Ital. f. 1017; Hegi, Ul. Fl. f. 543, e-i; Bull. Mich. Exp. Sta. 267: f. 49. 
XIII. Ambrosioidia. Ill-scented annuals or perennials, copiously furnished with yellow 
glands, sometimes also villous. Leaf-blades dentate to pinnatifid. Flowers sessile, spicate. 
Calyx-lobes rounded on the back. Pericarp gland-dotted. Seed horizontal, or sometimes 
vertical. 
43. Chenopodium vagans Standley. 
Chenopodium chilense Schrad. Ind. Sem. Hort. Gotting. 1832: 2. 1832.—Linnaea 8: Litt.-Ber. 25. 
1833. Not C. chilense Pers. 1805. 
Ambrina chilensis Spach, Hist. Vég. 5: 297. 1836. 
Erect or ascending, ill-scented perennial, 3-8 dm. high, much branched, at least above, 
the branches erect or ascending, loosely white-villous and viscid; leaf-blades oval, oblong, or 
broadly oblong, 2-6 cm. long, obtuse, tapering at the base to a slender petiole, irregularly and 
coarsely sinuate-dentate or incised-serrate, the teeth acute or obtuse, entire or dentate, bright- 
green, short-villous on both surfaces, copiously gland-dotted beneath, the blades of the in- 
florescence numerous, much reduced, entire, bract-like; flowers sessile in dense glomerules, 
forming slender, elongate, erect or ascending, very dense spikes 3-12 cm. long; calyx deeply 
cleft, the lobes obtuse or acutish, rounded on the back, glandular-villous, completely enclosing 
