754 



MANUAL OF POISONOUS PLANTS 



Fig. 43&a. Illustrating 1 structure of Compositae. Thistle 

 (Cirsiinii altissimum). 1, head; 2, leaf; 3, outer bracts of head; 

 4, inner bracts; 5, single flower; a, achene; b, pappus; c, tubu- 

 lar corolla with 5 lobes; d, anthers; e, style. 6, style enlarged 

 with two stigmas and pollen grains on style; 7, syngenesious 

 anthers cut lengthwise to show pollen grains and tailed appen- 

 dages; 8, single pollen grain. (Charlotte M. King). 



the Inula Hcleniitm, native to Europe and occasionally naturalized in the north- 

 ern states. It is a mild tonic and contains inulin C.H O , helcnin and a volatile 

 oil. The pellitory root (Anacyclus Pyrethrum) contains pyrethrin with a pungent 

 taste, which, according to Dunstan, is apparently identical with pipcrovatin C 1(J 

 H 01 NO . used for toothache; the flowers of Roman chamomile (Anthemis 

 nobilis) are used as a tonic and stomachic. However, German chamomile 

 (Matricaria Cli(iiiwiuilla) is sometimes substituted for the preceding and con- 

 tains anthcmidin and a deep-blue volatile oil. Santonica, a species of worm- 

 wood, Artemisia Cina, contains santonin C,-H..,O , and cinerol C.^H.-CX, is 



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