10 



CHENOPODIACEAE. 



VOL. II. 



i. Chenopodum album L. Lamb's Quarters. White Goosefoot. Pigweed. 



Fig. 1677. 



Chenopodium album L. Sp. PI. 219. 1753. 

 Chenopodium viride L. Sp. PI. 219. 1/53. 

 C. Berlandieri Moq. Enum. Chenop. 23. 1840. 

 C. paganmn Reichenb. Fl. Germ. 579. 1830. 

 Chenopodium album viride Moq. in DC. Prodr. 13- : 

 71. 1849. 



Annual, stem striate and grooved at least 

 when dry, erect, commonly branched, i-io tall. 

 Leaves rhombic-ovate or the upper lanceolate or 

 linear-lanceolate, narrowed at the base, acute, 

 cuspidate or sometimes obtuse at the apex, 3- 

 nerved, white-mealy beneath or sometimes green 

 on both sides, dentate, sinuate lobed, or entire, 

 I '-4' long; petioles often as long as the blades; 

 spikes terminal and axillary, often panicled; 

 calyx about \" broad in fruit, its segments 

 strongly keeled, usually completely enclosing the 

 utricle ; styles short, seed horizontal, black, shin- 

 ing, firmly attached to the pericarp; embryo a 

 complete ring. 



In waste places. A common weed throughout North 

 America except the extreme north. Naturalized from 

 Europe. Native also of Asia. Wild spinach. Frost- 

 blite. Baconweed. Muckweed. Fat-hen. June-Sept. 

 Consists of many races. 



2. Chenopodium incanum (S. Wats.) Heller. 

 Mealy Goosefoot. Fig. 1678. 



C. Fremonti incanum S. Wats. Proc. Am. Acad. 9 : 94. 



1874. 

 C. incanum Heller, Plant World i : 23. 1897. 



Annual, densely white-mealy nearly or quite to the 

 base, usually much-branched, i high or less, the 

 branches ascending. Leaves ovate to rhombic, $'-i' 

 long, often nearly as wide as long, few-toothed with 

 rather blunt teeth or some of them entire, paler - 

 beneath than above, the slender petioles mostly 

 shorter than the blades ; spikes short, borne in the 

 upper axils and in terminal panicles; calyx densely 

 mealy. 



In dry soil, Nebraska to Wyoming, Kansas and Ari- 

 zona. May-July. 



3. Chenopodium glaucum L. Oak-leaved Goosefoot. Fig. 1679. 



Chenopodium glaucum L. Sp. PI. 220. 1753. 

 Blitum glaucum Koch, Syn. Fl. Germ. 608. 1837. 



Annual, succulent, stem usually much branched, 

 decumbent or prostrate, or with erect branches, 4'- 

 18' high. Leaves oblong, lanceolate or ovate-lan- 

 ceolate, slender-petioled or the uppermost nearly 

 sessile, obtuse or acute at the apex, mostly narrowed 

 at the base, white-mealy beneath, dark green above, 

 i'-2' long, the lower or all of them sinuate-dentate 

 or lobed; flowers in small axillary often branched 

 spikes, the clusters usually shorter than the leaves, 

 or the upper panicled; calyx about i" broad, its 

 segments oblong or obovate, obtuse, neither fleshy 

 nor keeled in fruit ; utricle brown, depressed, its 

 summit not completely covered by the calyx ; styles 

 short; seed sharp edged, that of lateral flowers ver- 

 tical, somewhat exserted., that of terminal flowers 

 commonly horizontal; embryo a complete ring. 



A weed in waste places throughout North America 

 except the extreme north. Naturalized from Europe ; 

 now found in most cultivated areas of the globe. June- 

 Sept. 



