134 CHENOPODIACE.E. Chenopodium. 



2. Chenopodium hybridum, Linii. Maple-leaved Goosefoot. 



Stem herbaceous, branched ; leaves cordate-ovate, acuminate, angularly toothed, green on 

 both sides , the uppermost deltoid ; racemes paniculately branched, loose, leafless ; lobes of 

 the calyx carinate ; seeds lenticular, rugulose, acute on the margin. — Linn. sp. 1. p. 219 ; 

 Engl. bat. t. 1919 ; Pursh, Jl.\. p. 198 ; Bigel. fl. Bost. p. 107 ; Torr. fl. 1. p. 295 ; 

 Beck, hot. p. 296 ; Darlingt. fl. Cest. p. 177 ; Moq.-Tand. Chenop. p. 33. 



Annual. Stem 2-4 feet high. Leaves 2-4 inches long, very broad at the base, with 

 2-3 large angular teeth on each side, the point long and very acute ; the upper ones smaller, 

 deltoid and nearly entire. Flowers in large terminal panicles, which at length are very loose 

 and divaricate. Glomerules small, few-flowered. Calyx green ; the segments roundish. 

 Seed twice as large as in the preceding species, purplish black, flatly lenticular. 



About houses and along rivulets ; very common. Introduced from Europe. July - August. 



2. AMBRINA. Spach, veg.phan. 5. p. 297 ^- 299 ; Moq.-Tand. Chenop. p. 36. 



AMBRISA. 



[ Etymology uncertain.] 



Calyx 5 -parted. Stamens 5. Styles 2 (rarely 3), united below. Utricle compressed or 

 depressed, covered by the persistent calyx. Seed lenticular, horizontal or vertical. Embryo 

 forming an incomplete ring — More or less glandular and often pubescent herbs, of a strong 

 balsamic odor. Leaves toothed, sinuate or pinnatifid. 



1. Ambrina Botrys, Moq.-Tand. Jerusalem Oak. 



Erect or assurgent ; leaves oblong, pinnatifidly sinuate, obtuse , the upper ones spatulate- 

 oblong ; racemes cymose, rather dense, axillarjr and terminal, leafless ; lobes of the fructiferous 

 calyx not carinate ; seed horizontal, smooth, the margin obtuse. — Moq.-Tand. Chenop. p. 37. 

 Chenopodium Botrys, Linn. sp. 1. p. 219 ; Pursh, fl. I. p. 198 ; Ell. sk. 1. p. 130 ; Torr. 

 fl.\. p. 296 ; Bigcl. fl. Bost. p. 108 ; Beck, hot. p. 296 ; Darlingt. fl. Cest. p. 177. 



Annual ; glandularly pubescent, and a little viscid. Stem about a foot high, flexuous, with 

 somewhat rigid branches. Leaves numerous, 1-2 inches long, lobed somewhat like those 

 of the White Oak ; the upper ones much smaller and narrower in proportion. Flowers 

 minute, in small divaricate cymes. Lobes of the calyx oblong, rather acute. Seed dark 

 purple ; the albumen forming about three-fourths of a circle. 



Dry soils, roadsides and old fields ; probably introduced. July - August. The whole plant 

 has a strong balsamic and rather agreeable odor, especially when it is bruised. Mr. Nuttall 

 remarks that it is indigenous to the banks of the Missouri and Mississippi ; and it is also a 

 native of the south of Europe, Siberia and Persia. 



