592 CHENOPODIACfiiE kochia 



CHENOPODIUM 



Ovary ovoid, narrowed upward into the style : stigmas 2. Utricle 

 pear-shaped or oblong the pericarp membranaceous, not adherent 

 to the inverted seed. Embryo annular, green, enclosing the 

 scanty alhumem. 



K. Americana Watson Proc. Am. Acad, ix, 93. Woody and branch- 

 ing at base: stems erect, mostly simple and virgate, 6-18 inches high, 

 leafy, villous-tomentose to nearly glabrous : leaves terete, linear 3-12 lines 

 long, acutish, ascending: flowers 1-3 in the axils, mostly with abortive 

 stamens : calyx densely white-tomentose, nearly a line broad in fruit, the 

 membranous wing as wide or wider, its lobes cuneate, rounded, nerved and 

 somewhat crenulate : ovary ovate tomentose above : style elongated : peri- 

 carp nearly smooth : seed % of a line broad. Valleys and foothills, eastern 

 Oregon to Nevada and Arizona. 



3 CHENOPODIUM L. Sp 218. 



Annual or perennial herbs with alternate flat leaves and very 

 small perfect sessile, bractless flowers clustered in axillary and 

 terminal often panicled or compound spikes. Calyx 2-5-parted 

 or 2-5-lobed, more or less closely covering the fruit, its segments 

 or lobes herbaceous or somewhat fleshy, often keeled or rigid. 

 Stamens 1-5. Styles 2-4, slender. Pericarp membranaceous, 

 closely iii vesting the lenticular or globose seed. Testa crustace- 

 ous. Embryo annular or curved around copious albumen. 



§ 1 Chenopodiasteum Moq. in DC. Prodr. xiii, 61. Annu- 

 als, usually somewhat mealy but not pubescent, or glandular nor 

 aromatic. Fruit dry. Seeds lenticular, horizontal. Embryo 

 completely annular. 



C. ALBDM L, Sp. 319. ^Lamb's QnABiEKS.) More or less mealy 

 t hroughout: stem usually slender erect, copimonly much branched usually 

 1-4 feet high: leaves rhombic-ovate or the upper ones lanceolate to lineai'- 

 lanceolate, 1-4 inches long, obtuse or acute, at least the lower ones sinuate- 

 dentate, the upper usually entire: flowers densely clustered in simple or com- 

 pound often panicled spikes: calyx about half a line broad in fruit, its segments 

 strongly keeled, usually completely enclosing the utricle: seed firmly attached 

 to the pericgj-p. Opmraon in cultivated fields and waste places everywhere. 



C. hj^bridum L. Sp. 519. Glabrous throughout, or the inflorescence 

 more or less mealy: stem rather stout erect, 2-4 feet high, simple or sparing- 

 ly branqfied above: leaves ovate or rbombic-ovate, long-acuminate at the 

 apex, truncate, rounded or subcordate at base, sharply dentate with 1-4 large 

 acute teeth on each side, or the upper lanceolate and entire, the lower ones 4- 

 7 inches long: flowers in large axillaiy and terminal panicles: calyx about a 

 line broad its segments oblong, slightly keeled incompletely covering the 

 fruit; stamens 5 : seed sharp-edged, firmly attached to the pericarp. In 

 woods and thickets, Brit. Columbia to Oregon and the Atlantic;: States, also 

 EuropeJ 



C. MUKALB L. Sp. 219. Scarcely or not at all mealy, somewhat scurfy 

 above: stems erect or decumbent, usually branched 1-^ feet high: leaves 

 rhombic-ovate bright green on both sides, acute or acuminate at the apex, 

 sharply and coarsely sinuate dentate, broadly cuneate or subtruncate at base, 

 2-4 inches long: flowers in loose axillary panicles shorter than the leaves: seg- 

 ments of the ealyx not entirely enclosing the utricle: seeds sharp-edged, firmly 

 attached to the pericarp. Along the coast. Brit. Columbia to California 



