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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 Chenopodium album and C. hy- 

 bridum are weedy. 



Chenopodium 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 (L.) 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 



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Fig. 205. Wormseed (Chenopodium am- 

 brosioides). Fruit officinal. (From Darling- 

 ton's Weeds and Useful Plants.) 



