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MANUAL OF POISONOUS PLANTS 



fore the conquest by Spain. An oil is obtained from the wormseed (C. am- 

 brosioides). Several species of the genus like Chenopodvum album and C. hy- 

 bridum are weedy. 



Chenopodiuwi Botrys L. Jerusalem Oak. 



A more or less glandular, pubescent, aromatic annual; leaves with slender 

 petioles, oblong, obtuse, sinuate, pinnatifid, flowers in leafless racemes; calyx 

 2-3 parted, dry in fruit, only partially enclosed. 



Distribution. Naturalized from tropical America. Common in eastern North 

 America to Oregon. 



Chenopodium ambrosioides L. Mexican Tea. Wormseed 



A smooth annual; leaves slightly petioled, aromatic, oblong, lanceolate, 

 toothed or nearly entire; flowers in spikes, leafy or intermixed with leaves; 

 calyx 2-3 parted ; fruit dry, enclosed by the calyx. 



Distribution. Naturalized from tropical America. Common in eastern North 

 America to California. The fruit is officinal in the U. S. Pharmocopoeia. ■ 



Chenopodium ambrosioides L. var. anthelminticum (Iv.) Gray. Wormseed 



An annual or perennial weed, glandular pubescent; leaves lanceolate, or 

 ovate-lanceolate, acuminate at the apex and narrowed at the base, the lower 



Fig. 205. Wormseed ^Chenopodium am- 

 brosioides). Fruit oiGcinal. (From Darling- 

 ton's Weeds and Useful Plants.) 



