CHENOPODIACEJE. (GOOSEFOOT FAMILY.) 363 



or less enveloping the depressed fruit. Stamens mostly 5 : filaments filiform. 

 Styles 2, rarely 3. Seed horizontal (sometimes vertical in Nos. 7 and 9), len- 

 ticular: embryo coiled partly or fully round the mealy albumen. Weeds, 

 usually with a white mealiness, or glandular. Flowers sessile in small clusters 

 collected in spiked panicles. (Name from x*l v * a goose, and TTOVS, foot, in allu- 

 sion to the shape of the leaves.) Our species are all annuals (except No. 91), 

 flowering through the summer, growing around dwellings, in manured soil, 

 cultivated grounds, and waste places. 



1. CHENOPODIUM PROPER. Smooth or mealy, never pubescent or glandular 

 nor sweet-scented : embryo a complete ring. 



* Leaves entire: herbage green, sometimes turning purplish, no mealiness: calyx- 



lobes not keeled nor wholly enclosing the fruit. 



1. C. POLYSPERMUM, L. Stems slender, ascending; leaves oblong or ovate- 

 oblong, obtuse or acutish, narrowed into a slender petiole. A scarce garden- 

 weed, about Boston, C. J. Sprague. Woods, near Mercersburg and Reading, 

 Penn., Porter: the var. SPICATUM (C. acutifolium, Smith). (Nat. from Eu.) 



* * Leaves strongly and sharply toothed, green throughout (mealiness obscure or none), 

 on slender petioles : calyx-lobes slightly or not at all keeled, not completely enclosing 

 the ripe fruit (least enclosing in No. 2, most so in No. 4). 



2. C. HYBRIDUM, L. (MAPLE-LEAVED GOOSEFOOT.) Bright green ; stem 

 widely much branched (2 -4 high) ; leaves thin (2' -8' long), somewhat trian- 

 gular and heart-shaped, taper-pointed, sinuate-angled, the angles extended into a 

 few large and pointed teeth ; racemes diffusely and loosely panicled, leafless ; the 

 smooth calyx-lobes keeled ; seed sharp-edged, the thin pericarp adhering closely 

 to it. Common. Heavy-scented, like Stramonium. (Nat. from Eu.) 



3. C. tfRBicuM, L. Bather pale or dull green, with erect branches (l-3 

 high) ; leaves triangular, acute, coarsely many-toothed; spikes erect, crowded in a 

 long and narrow racemose panicle ; calyx-lobes not keeled ; seed with rounded mar- 

 gins. Var. RHOMBIF6LIUM, Moquin (C. rhombifolium, MuhL), is a form 

 with the leaves more or less wedge-shaped at the base, and with longer and 

 sharper teeth. Not rare eastward. (Nat. from Eu.) 



4. C. MURALE, L. Ascending, loosely branched (1-1|- high); leaves 

 rhomboid-ovate, acute, coarsely and sharply unequally toothed, thin, bright green ; 

 spikes or racemes diverging and somewhat corymbed ; calyx-lobes scarcely keeled ; 

 seed sharp-edged. Boston, New York, &c. : rare. (Adv. from Eu.) 



* # # Leaves toothed, repand-angled, or sometimes nearly entire, more or less white- 

 mealy, as well as the flowers : calyx-lobes distinctly keeled, usually (but not always) 

 perfectly enclosing the fruit. 



5. C. OPULIF6LIUM, Schrad. Leaves round-rhombic, spreading, long-petioled, 

 very obtuse, somewhat 3-lobed, toothed, the upper oblong-lanceolate ; racemes 

 panicled, rather loose, ; seed with rather obtuse margins. Seen from U. S. by 

 Moquin : probably it has been confounded with the next ; perhaps justly. (Adv. 

 from Eu.) 



6. C. ALBUM, L. (LAMB'S-QUARTEBS. PIGWEED.) Leaves ascending, 

 varying from rhombic-ovate to oblong-lanceolate, or the upper linear-lanceolate, or"" 1 



