A CATALOGUE OF THE POISONOUS PLANTS OF IOWA. 
BY L. H. PAMMEL AND ESTELLE D. FOGEL. 
For a number of years we have given a course of lectures on 
plants poisonous and injurious to live stock to the veterinary stu- 
dents of the Iowa State College. 
From stockmen and farmers in various parts of the state we fre- 
quently receive queries in regard to poisonous plants. In some cases 
the queries are accompanied with specimens. We are often asked 
to give more detailed information. In many cases, however, the 
evidence of poisoning is not proven; certain weeds are found in a 
pasture and the farmer supposes that they may be responsible for 
the death of animals. 
The literature on the subject is quite meager so far as the plants 
of Iowa are concerned. The government has published several 
papers dealing with this subject, of these papers I may mention 
those by Chesnut 1 , Chesnut and Wilcox 2 , Wilcox 3 , and Nelson 4 . 
Other writers on the same subject are O’Gara 5 , Kennedy 6 , Peters, 
Slade & Avery 7 , Glover 8 , Crawford 9 , Heald^& Peters 10 , White 11 , 
Johnson 12 , Bessey 13 , Rusby 14 , Guttenberg 1 5 , Pammel 16 , Mills- 
1. Principal Poisonous Plants of the United States, Div. Bot. U. S. Dept. Agr. 20:60, f 34. 
Thirty Poisonous Plants of the United States, U. S. Dept. Agr. Farmers Bull. 86:32, f 24. 
Rep. Bu. An. Ind. 15:387-420, f. 69. 
2. The Stock Poisoning plants in Montana, Bull. Div. Bot. U. S. Dept. Agr. 26:150, pi. 86. 
3. Rep. Bu. An. Ind. 17:91-121, pi. 32. 
4. Feeding Wild Plants to Sheep, Rep. Bu. An. Ind. 15:421-425. 
5. Rep. Netor. Agr. Expt. Sta. 16:14-84, f. 13. 
6. Bull. Nev. Agr. Expt. Sta. 51:57, pi. 26. 
7. Poisoning of Cattle by Common Sorghum and Kafir Corn, Neb. Agr. Expt. Sta. 77:16. 
8. Bull. Col. Agr. Expt. Sta. 113:24, pi. 8. 
9. The Poisonous Action of Johnson Grass, Bull. Bur. PI. Ind. 90:6, part 4. 
10. Ergot and Ergotism, Press Bull. Nebr. Agr. Expt. Sta. 24, f. 3. 
11. Dermatitis Venenata, An Account of the Action of External Irritants upon the Skin, 
216:1887. 
12. A Manual of the Medical Botany of N. Amer. p. 292, pi. 9, f. 160. 
13. Bull. Dept. Bot. 1884. Proc. Soc. Prom. Agr. Sci. 23:35-41. 
14. Poisonous Plants of the Vicinity of New York City, 19. 
15. Poisonous Plants which Grow in and around Erie, 21:25. 
16. Bull. la. Agr. Expt. Sta. 70:423-448. Poisoning from Cowbane, Bull. Ia. Agr. Expt. 
Sta. 28:215-225, f. 5. 
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