MISCELLANEOUS DICOTYLEDONOUS PLANTS 87 



perforated appearance, when the leaf is held between the eye and the 

 light. The purple coloring matter in the terminal glands has been isolated 

 and named hypericum red. This dye is fluorescent in solution and much 

 resembles certain aniline derivatives. 



English Ivy (Hedera helix). This climbing plant makes the ascent 

 of tree trunks, stone and brick walls by means of short, aerial roots. Its 

 leaves are lobed, dark, lustrous, evergreen. The plant is not known to be 

 poisonous to stock, but children 

 have been poisoned by eating the 

 berries. 



The plant contains a bitter 

 principle with cathartic, emetic 

 and purgative properties. A 

 poisonous glucoside hederin 

 (C64Hio40ig) and a resin is found 

 i.n the English ivy. The 

 symptoms produced in children 

 were diarrhoea, nervous symp- 

 toms resembling those of intoxica- 

 tion, excitement at first,then coma, 

 convulsions, uncertain gait, ster- 

 torous respiration and paralysis. 



Water Hemlock, Oregon 

 Hemlock and European Hemlock 

 (Cicuta maculata, C. vagans and 

 C. virosa). 



Description. These plants of 

 the family UMBELLIFER.E _, PIG as.-Water hemlock 



3 dentalts). One-half natural size. (After 



(APIACE^;) are also known as Hall, Harvey M. and Gates, Harry S.: Stock 



cowbane, musquash root, musk- >'">* "? f California Agricultural 



Experiment Station, 1915, p. 223.) 



rat weed. The American cow- 

 bane, Cicuta maculata, has tuberous rootstocks from which arise in 

 swampy situations a stem one to two meters tall bearing twice to thrice 

 compound leaves. The leaf segments are lanceolate, or ellyptic-lanceolate, 

 acuminate, coarsely serrate. The flowers are white borne in compound 

 umbels subtended by linear-subulate bracts. This species ranges from 

 New Brunswick to Manitoba to Virginia and Texas. The western 

 species, Cicuta vagans, is found about lakes, in wet meadows and swamps 



