CHENOPODIACE2E. (GOOSEFOOT FAMILY.) 303 



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 \^ 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. Sprayue. Woods, near Mercersburg and Reading, 

 Penn,, Porter : the var. SPICATUM (C. acutifolium, Smith}. (Xat. 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. URBICUM, L. Rather 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 

 kharpcr 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, to Illinois : rare. (Adv. from Eu.) 



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

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

 perfectly enclosing the fruit. 



5. C, OPULIF6LIUM, Schrad. Leaves n mid-rhombic, spreading, long-pctioled, 

 rery obtuse, somewhat 3-lobed, toothed, tho upper oblong-lanceolate; racemes 

 panicled, rather looso ; 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-QUARTERS. PIGWEED.) Ascending ; leaves ; 

 rarying; from rhombic-ovate to oblong-lanceolate., or the upper linear -lanceolate, acute t 



