96 PASTORAL AND AGRICULTURAL BOTANY 



a recurrence of the inflammation after some time. Mr. Thomas Meehan 

 describes a person, who after potting a lot of Primula obconica had his 

 face so swollen that he remained completely blind for a day. 



Privet (Ligustrum vulgar e). The privet and several other species of 

 Ligustrum are used commonly as hedge plants, for which purpose they are 

 very suitable. The oval leaves are opposite and remain green well into 

 the winter. Cases of poisoning of children, who have eaten the fruits, 

 are recorded causing violent purging, a boy and a girl having died. Horses 

 are poisoned and killed, the symptoms being a loss of power in the hind 

 limbs with a weak and reduced pulse and a temperature of io2F. 

 The mucous membranes are injected, slightly, the pupils are dilated and 

 death results in 36 to 48 hours. 



The poisonous principles are the glucosides ligustrin and ligustron 

 together with syringin CnH^Og and the bitter glucosidal principle 

 syringopicrin, C^HziOn- These also occur in the lilac, Syringa vulgaris. 



BIBLIOGRAPHY 



ANON.: Poisoning by Primroses. Scientific American, Supplement 83: 411, June 

 30, 1917. 



CHESTNUT, V. K. : Thirty Poisonous Plants. Farmers' Bulletin 86, U. S. Department 

 of Agriculture, 1898, pages 23-29. 



CRAWFORD, ALBERT C.: Mountain Laurel, a Poisonous Plant. Bulletin 121, Part II, 

 Bureau of Plant Industry, U. S. Department of Agriculture, 1908. 



HARSHBERGER, JOHN W.: Poisonous Plants. Standard Cyclopedia of Horticulture, 

 second edition, vi, 2728-2729. 



LONG, HAROLD C.: Plants Poisonous to Live Stock. Cambridge at the University 

 Press, 1917, pages 36-42, 46-49. 



LUTZ, O. : Poisonous Nature of the Stinging Hairs of Jatropha urens. Science News, 

 40, 609. 



MARSH, C. D WIGHT: Menziesia, a New Stock-poisoning Plant of the Northwestern 

 States. Drug and Poisonous Plant Investigations. U. S. Department of Agri- 

 culture, Bureau of Plant Industry, Preliminary Notice, June 10, 1914. 



MARSH, C. DWIGHT, CLAWSON, A. B. and MARSH, HADLEIGH: Cicuta or Water Hem- 

 lock. Bulletin 69, U. S. Department of Agriculture, March 28, 1914. 



NESTLER, A.: Plants Venomous to Touch. Scientific American Supplement 75: 68, 

 February i, 1913. 



PAMMEL, L. H.: Manual of Poisonous Plants. Part 2, 1911, pages 645-679. 



LABORATORY WORK 



i. The class should describe by use of the outline given on page 54 the various 

 plants described in this chapter, either as alcoholic, dried, or fresh specimens. With 



