Poisonous Plants of Georgia
The Herbarium at the University of Georigia
The Herbarium of the University of Georgia, Athens, Georgia

Important Links:

GA Poison Control Center

Herbarium at UGA

Georgia Museum of Natural History

Poisonous Plants in the Landscape - this is a link to a publication from the Cooperative Extension Service and the University of Georgia College of Agricultural and Environmental Sciences

Georgia County Extension Agents -this link takes you to a site where you can locate Georgia extension agents by county

Credits:

The following is a detailed list of sources used to create this website.

Photo Credits: Many thanks to Dr. Wilbur Duncan, Lisa Kruse, Dr. Wendy Zomlefer, and Dr. Claudio Barros for allowing me to use their photos in this site.

Glossary Credits: The glossary was created by compiling definitions from several sources including:

Guide to Flowering Plant Families by Wendy B. Zomlefer
Plant Identification Terminology: An Illustrated Glossary by Harris and Woolf Harris
Manual of the Vascular Flora of the Carolinas by Radford, Ahles, and Bell

Scientific Literature Credits: The taxonomic, medical, and veterinary information found on this site was compiled from the following books and journal articles:

1. Arseculeratne, S.N., A.A.L. Gunatilaka, and R.G. Panabokke, Studies on medicinal plants of Sri Lanka: Occurrence of pyrrolizidine alkaloids and hepatotoxic properties in some traditional medicinal herbs. Journal of Ethnopharmacology, 1981. 4: p. 159-177.

2. Artz, J. and M. Mount, Hepatoxicity associated with pyrrolizidine alkaloid (Crotalaria spp) ingestion in a horse on Easter Island. Veterinary and Human Toxicology, 1999. 41(2): p. 96-99.

3. Avenel-Audran, M., B. Hausen, and J. le Sellin, Allergic contact dermatitis from hydrangea - is it so rare? Contact dermatitis, 2000. 43: p. 189-191.

4. Baer, H., Allergic Contact Dermatitis From Plants, in Handbook of Natural Toxins, R. Keeler and A. Tu, Editors. 1983, Marcel Dekker Inc.: New York. p. 421-442.

5. Baker, D., R. Keeler, and W. Gaffield, Toxicosis from steroidal alkaloids of Solanum species, in Handbook of Natural Toxins: Toxicology of plant and fungal compounds, R. Keeler and A. Tu, Editors. 1991, Marcel Dekker, Inc.: New York. p. 71-82.

6. Ballentine, C., et al., Pretty but poisonous. FDA Consumer, 1985. 19: p. 41.

7. Balucani, M. and D. Zellers, Podophyllum resin poisoning with complete recovery. Journal of the American Medical Association, 1964. 189(8): p. 639-640.

8. Bania, T., et al., Accidental Indian Hemp (Apocyneacea cannabinum) Cardiac Glycoside Toxicity (Abstract). Veterinary and Human Toxicology, 1993. 35(4): p. 328.

9. Barnea, A., J. Harborne, and C. Pannell, What parts of fleshy fruits contain secondary compounds toxic to birds and why. Biochemical Systematics and Ecology, 1993. 21(4): p. 421-429.

10. Basden, K. and R. Dalvi, Determination of total phenolics in acorns from different species of oak trees in conjunction with acorn poisoning in cattle. Veterinary and Human Toxicology, 1987. 29(4): p. 305-306.

11. Basson, P., et al., Albizia poisoning: report of the first outbreak and some experimental work in South Africa. Journal of the South African Veterinary Medical Association, 1970. 41(2): p. 117-130.

12. Beier, R. and J. Norman, The toxic factor in white snakeroot: identity, analysis, and prevention (abstract). Veterinary and Human Toxicology, 1990. 32(Supplement): p. 81-8.

13. Beier, R., et al., Microsomal activation of constituents of white snakeroot (Eupatorium rugosum Houtt) to form toxic products. American Journal of Veterinary Research, 1987. 48(4): p. 583-585.

14. Beier, R., et al., Isolation of the major component in white snakeroot that is toxic after microsomal activation: possible explanation of sporadic toxicity of white snakeroot plants and extracts. Natural Toxins, 1993. 1: p. 286-293.

15. Blaw, M.E., et al., Poisoning with Carolina jessamine (Gelsemium sempervirens L. Ait). The Journal of Pediatrics, 1979. 94: p. 998-1001.

16. Blum, L. and F. Rieders, Oleandrin distribution in a fatality from rectal and oral Nerium oleander extract administration. Journal of Analytical Toxicology, 1987. 11: p. 219-221.

17. Borys, D., et al., The clinical effects of Solanum dulcamara in pediatric patients (Abstract). Veterinary and Human Toxicology, 1992. 34(4): p. 351.

18. Bradley, G., et al., Neuroaxonal degeneration in sheep grazing Sorghum pastures. Journal of Veterinary Diagnostic Investigation, 1995. 7: p. 229-236.

19. Breeze, R., et al., Perilla ketone toxicity: a chemical model for the study of equine restrictive lung disease. Equine Veterinary Journal, 1984. 16(3): p. 180-184.

20. Bruneton, J., Toxic Plants Dangerous to Humans and Animals. first ed. 1999, Paris: Lavoisier Publishing. 545.

21. Bruynzeel, D., Contact dermatitis from hydrangea. Contact dermatitis, 1991. 24: p. 78.

22. Budavari, S., et al., eds. The Merck Index. Twelfth ed. 1996, Merck & Co.: Whitehouse Station.

23. Buhrmester, R., J. Ebinger, and D. Seigler, Sambunigrin and cyanogenic variability in populations of Sambucus canadensis L. (Caprifoliaceae).
Biochemical Systematics and Ecology, 2000. 28(7): p. 689-695.

24. Burrows, G.E. and R.J. Tyrl, Toxic plants of North America. 1st ed. Vol. 1. 2001, Ames: Iowa State University Press. 1342.

25. Calore, E., et al., Toxic peripheral neuropathy of chicks fed Senna occidentalis seeds. Ecotoxicology and Environmental Safety, 1998. 39: p. 27-30.

26. Canal, C., et al., Podophyllotoxin. Phytochemistry, 2000. 54: p. 115-120.

27. Cassidy, D., J. Drewry, and J. Fanning, Podophyllum Toxicity: A report of a fatal case and a review of the literature. Clinical Toxicology, 1982. 18(1): p. 35-44.

28. Casteel, S., et al., Amaranthus retroflexus (redroot pigweed) poisoning in cattle. Journal of the AMerican Veterinary Medical Association, 1994. 204(7): p. 1068-1070.

29. Ceha, L., et al., Anticholinergic toxicity from nightshade berry poisoning responsive to physostigmine. The Journal of Emergency Medicine, 1997. 15(1): p. 65-69.

30. Challoner, K.R. and M.M. McCarron, Castor Bean Intoxication. Annals of Emergency Medicine, 1990. 19: p. 1177-1183.

31. Chan, T., Aconitine Poisoning: A Global Perspective. Veterinary and Human Toxicology, 1994. 36(4): p. 326-328.

32. Cheeke, P.R., Toxicity and metabolism of pyrrolizidine alkaloids. Journal of Animal Science, 1988. 66: p. 2343-2350.

33. Christensen, W.I., Milk Sickness: A Review of the Literature. Economic Botany, 1965. 19: p. 293-300.

34. Costanza, D. and V. Hoverstein, Accidental Ingestion of Water Hemlock. The Western Journal of Medicine, 1973. 119(2): p. 78-82.

35. Courtemanche, L.A., Poisoning due to Veratrum viride (Abstract). Veterinary and Human Toxicology, 1989. 31(4): p. 360.

36. Craigmill, A., D. Crosby, and W. Kilgore, The transfer of teratogenic lupine alkaloids to human beings through milk (Abstract). Journal of the AMerican Veterinary Medical Association, 1983. 183(3): p. 351.

37. Dalvi, R. and W. Bowie, Toxicology of solanine: an overview. Veterinary and Human Toxicology, 1983. 25: p. 13-15.

38. Dickie, C., et al., Oxalate (Rumex venosus) poisoning in cattle. Journal of the AMerican Veterinary Medical Association, 1978. 173(1): p. 73-74.

39. Divers, T., L. George, and J. George, Hemolytic anemia in horses after the ingestion of red maple leaves. Journal of the AMerican Veterinary Medical Association, 1982. 180(3): p. 300-302.

40. Dollahite, J. and T. Allen, Poisoning of cattle, sheep, and goats with Lobezla and Centaurium species. The Southwestern Veterinarian, 1962. 15: p. 126-132.

41. Dollahite, J., W. Hardy, and J. Henson, Toxicity of Helenium microcephalum (Smallhead Sneezeweed). Journal of the AMerican Veterinary Medical Association, 1964. 145(7): p. 694-697.

42. Dollahite, J., et al., Toxicity of Helenium amarum (Bitter sneezeweed) to Sheep. The Southwestern Veterinarian, 1972. 26: p. 135-137.

43. Duckworth, R., Poisoning of cattle by amaranthus. New Zealand Veterinary Journal, 1975. 23: p. 154-155.

44. Duffy, D., Land of Milk and Poison. Natural History, 1990. 7: p. 4-8.

45. Edgerton, P.H., Symptoms of digitalis-like toxicity in a family after accidental ingestion of lily of the valley plant. Journal of Emergency Nursing, 1989. 15(3): p. 220-223.

46. Evans, K. and J. Cook, Japanese Yew Poisoning in a Dog. Journal of the American Animal Hospital Association, 1991. 27: p. 300-302.

47. Fairbairn, J.W. and P. Suwal, The alkaloids of hemlock (Conium maculatum L. ) II. Phytochemistry, 1961. 1: p. 38-46.

48. Farre, M., et al., Fatal oxalic acid poisoning from sorrel soup. Lancet, 1989. 2: p. 1527.

49. Faz, E., C. Goicochea, and M. Ruano, Cassia occidentalis toxicosis in heifers. Veterinary and Human Toxicology, 1998. 40(5): p. 307.

50. Fenwick, G. and A. Hanley, Allium species poisoning. The Veterinary Record, 1985. 116: p. 28.

51. Fernando, C., Poisoning due to Abrus precatorius (jequirity bean). Anaesthesia, 2001. 56: p. 1178-1180.

52. Flory, W. and C. Hebert, Determination of the oral toxicity of Sesbania drummondii seeds in chickens. American Journal of Veterinary Research, 1984. 45(5): p. 955-958.

53. Frank, B.S., et al., Ingestion of Poison Hemlock (Conium maculatum). Western Journal of Medicine, 1995. 163: p. 573-574.

54. Furbee, B. and M. Wermuth, Life-Threatening Plant Poisoning. Critical Care Clinics, 1997. 13(4): p. 849-888.

55. Garg, S., et al., Oak (Quercus incana) leaf poisoning in cattle. Veterinary and Human Toxicology, 1992. 34(2): p. 161-164.

56. Ghisalberti, E., Lantana camara L. (Verbenaceae). Fitoterapia, 2000. 71: p. 467-486.

57. Giannasi, D.E. and D.J. Crawford, Biochemical Systematics II. A Reprise, in Evolutionary Biology. 1986, Plenum Publishing Company. p. 25-246.

58. Goodwin, T.W. and E.I. Mercer, Introduction of Plant Biochemistry. Second ed. 1983, New York: Pergamon Press Inc.

59. Gossinger, H., K. Hruby, and A. Haubenstock, Cardiac arrhythmias in a patient with grayanotoxin-honey poisoning. Veterinary and Human Toxicology, 1983. 25: p. 328-329.

60. Gunn, C.R., Abrus precatorius: Pretty but poisonous. Science, 1969. 164: p. 245-246.

61. Haas, L.F., Convallaria majalis. Journal of Neurology, Neurosurgery, and Psychiatry, 1995. 59(4): p. 367.

62. Hanna, J.P., J.W. Schmidley, and W.E. Braselton, Datura Delirium. Clinical Neuropharmacology, 1992. 15(2): p. 109-113.

63. Hansen, A., Two fatal cases of potato poisoning. Science, 1925. 61(1578): p. 340-341.

64. Harborne, J., Introduction of Ecological Biochemistry. Fourth ed. 1996, London: Academic Press. 318.

65. Harper, P., et al., Vetch toxicosis in cattle grazing Vicia villosa ssp dasycarpa and V. benghalensis. Australian Veterinary Journal, 1993. 70(4): p. 140-144.

66. Hart, M., Hazards to Health: Jequirity-Bean Poisoning. The New England Journal of Medicine, 1963. 268(16): p. 885-886.

67. Haynes, B.E., H.A. Bessen, and W.D. Wightman, Oleander tea: herbal draught of death. Annals of Emergency Medicine, 1985. 14: p. 350-353.

68. Heilpern, K., Zigadenus poisoning. Annals of Emergency Medicine, 1995. 25(2): p. 259-262.

69. Hibbs, C., E. Stencel, and R. Hill, Nitrate toxicosis in cattle. Veterinary and Human Toxicology, 1978. 20(1): p. 1-2.

70. Hickey, T., et al., Irritant contact dermatitis in humans from phorbol and related esters. Toxicon, 1981. 19(6): p. 841-850.

71. Hightower, C., Plants that kill and cure. Veterinary and Human Toxicology, 1979. 21(5): p. 360-2.

72. Hill, R. and R. van Heyningen, Ranunculin: The precursor of the vesicant substance of the buttercup. Biochemical Journal, 1951. 49: p. 332-335.

73. Hintz, H., Bracken fern. Equine Practice, 1990. 12(6): p. 6-7.

74. Hirono, I., Carcinogenic principles isolated from bracken fern. CRC Critical Reviews in Toxicology, 1986. 17(1): p. 1-22.

75. Hoch, J., Poisonous Plants of South Carolina. Acta Phytotherapeutica, 1969. 16(10): p. 181-184.

76. Holliman, A. and D. Milton, Helleborus foetidus poisoning of cattle. The Veterinary Record, 1990. 127: p. 339-340.

77. Hornfeldt, C., Confusion over toxicity of pointsettia. Journal of the American Veterinary Medical Association, 1989. 194(8): p. 1004.

78. Hornfeldt, C. and J. Collins, Toxicity of nightshade berries (Solanum dulcamara) in mice. Clinical Toxicology, 1990. 28(2): p. 185-192.

79. Howatt, S., The toxicity of tansy ragwort. Weed Technology, 1989. 3(2): p. 436-438.

80. Issacs, A., J. Daintith, and E. Martin, eds. A dictionary of science. 1999, Oxford University Press: London. 850.

81. Jadhav, S., et al., Solanum alkaloids: biosynthesis and inhibition by chemicals. Journal of Food Science, 1973. 38: p. 453-455.

82. Jaeckle, K.A. and F.R. Freemon, Pokeweed Poisoning. Southern Medical Journal, 1981. 74(5): p. 639-640.

83. Jaffe, A., D. Gephardt, and L. Courtemanche, Poisoning due to ingestion of Veratrum viride (False Hellebore). Journal of Emergency Medicine, 1990. 8: p. 161-167.

84. James, L., et al., Plant Toxicants in Milk, in Plant Associated Toxins, S. Colegate and P. Dorling, Editors. 1994, CAB International: Wallingford.

85. Jarvis, B., et al., Brazilian Baccharis toxins: livestock poisoning and the isolation of macrocyclic trichothecene glucodsides. Natural Toxins, 1996. 4: p. 58-71.

86. Johnson, A. and R. Molyneux, Toxicity of threadleaf groundsel (Senecio douglasii var longilobus) to cattle. American Journal of Veterinary Research, 1984. 45(1): p. 26-31.

87. Johnson, C. and J. Routledge, Suspected helleborus viridis poisoning of cattle. The Veterinary Record, 1971. 89(7): p. 202.

88. Kauntze, R. and J. Trounce, The hypotensive action of veriloid (Veratrum viride): A clinical investigation. Lancet, 1951: p. 549-555.

89. Keeler, R., L. Balls, and K. Panter, Teratogenic effects of Nicotiana glauca and concentration of anabasine, the suspect teratogent in plant parts. Cornell Veterinarian, 1981. 71: p. 47-53.

90. Keeler, R. and M. Crowe, Teratogenicity and toxicity of wild tree tobacco, Nicotiana glauca in sheep. Cornell Veterinarian, 1984. 74: p. 50-59.

91. Kelch, W., L. Kerr, and H. Adair, Suspected buttercup (Ranunculus bulbosus) toxicosis with secondary photosensitization in a Charolais heifer. Veterinary and Human Toxicology, 1992. 34(3): p. 238-239.

92. Kerr, L. and W. Kelch, Fatal privet (Ligustrum amurease) toxicosis in Tennessee cows. Veterinary and Human Toxicology, 1999. 41(6): p. 391-392.

93. Kinamore, P.A., R.W. Jaeger, and F. de Castro, Abrus and Ricinus Ingestion: Management of Three Cases. Clinical Toxicology, 1980. 17(3): p. 401-405.

94. Kingsbury, J., Poisonous plants of the United States and Canada. first ed. 1964, Englewood Cliffs: Prentice-Hall. 206-208.

95. Knight, A., Locoweed poisoning. The compendium on continuing education for the practicing veterinarian, 1987. 9(12): p. F418-F420.

96. Knight, B., Ricin- a potent homicidal poison. British Medical Journal, 1979: p. 350-351.

97. Knutsen, O. and P. Paszkowski, New aspects in the treatment of water hemlock poisoning. Clinical Toxicology, 1984. 22(2): p. 157-166.

98. Kollef, M., Adult respiratory distress syndrome after smoke inhalation from burning poison ivy. Journal of the American Medical Association, 1995. 274(4): p. 359-359.

99. Krenzelok, E.P. and T.D. Jacobsen, Plant Exposures...A National Profile of the Most Common Plant Genera. Veterinary and Human Toxicology, 1997. 39(4): p. 248-249.

100. Krenzelok, E.P., T.D. Jacobsen, and J.M. Aronis, Lily-of-the-valley (Convallaria majalis) exposures: are the outcomes consistent with the reputation? (Abstract). Clinical Toxicology, 1996. 34: p. 601.

101. Krenzelok, E.P., T.D. Jacobsen, and J.M. Aronis, Hemlock Ingestions: The most deadly plant exposures. Clinical Toxicology, 1996b. 34: p. 601-602.

102. Kuligowski, M., A. Chang, and J. Leemreize, Allergic contact hand dermatitis from hydrangea: report of a 10th case. Contact dermatitis, 1992. 26: p. 269-270.

103. Kurlan, J. and I. Lucky, Black spot poison ivy: a report of 5 cases and a review of the literature. Journal of the American Academy of Dermatology, 2001. 45: p. 246-249.

104. Lampe, K.F., Changes in therapy in Abrus and Ricinus poisoning suggested by recent studies in their mechanism of toxicity (Abstract). Clinical Toxicology, 1976. 9(1): p. 21.

105. Lampe, K.F. and M.A. McCann, AMA Handbook of Poisonous and Injurious Plants. 1st ed. 1985, Chicago: American Medical Association. 432.

106. Landers, D., K. Seppi, and W. Blauer, Seizures and death on a White River float trip. Western Journal of Medicine, 1985. 142: p. 637-640.

107. Lang, D., R. Smith, and R. Miller, Detecting Taxus Poisoning Using GC/MS. Veterinary and Human Toxicology, 1997. 39(5): p. 314.

108. Langford, S. and P. Boor, Oleander toxicity: an examination of human and animal toxic exposures. Toxicology, 1996. 109: p. 1-13.

109. Lewis, W.H. and P.R. Smith, Poke Root Herbal Tea Poisoning. Journal of the American Medical Association, 1979. 242(25): p. 2759-2760.

110. Linnaberry, R., et al., Acute bovine pulmonary emphysema (ABPE): perilla ketone as another cause. Veterinary and Human Toxicology, 1978. 20: p. 325-326.

111. Liu, S., J. Pezzuto, and A. Kinghorn, Additional biologically active constiuents of the chinese tallow tree (Sapium sebiferum). Journal of Natural Products, 1988. 51(3): p. 619-620.

112. Lopez, R., et al., Taxonomical, clinical and pathological findings in moradilla (Lobelia-like) poisoning in sheep. Veterinary and Human Toxicology, 1994. 36(3): p. 195-198.

113. Mahler, D.A., The Jimson Weed High. Journal of the American Medical Association, 1975. 231(2): p. 138.

114. Mancini, S.D. and J.M. Edwards, Cytotoxic principles from the sap of Kalmia latifolia. Journal of Natural Products, 1979. 42(5): p. 483-488.

115. Manoguerra, A. and D. Freeman, Acute poisoning from the ingestion of Nicotiana glauca. Clinical Toxicology, 1983. 19(8): p. 861-864.

116. Martens, P.R. and K. Vandevelde, A near lethal case of combined strychnine and aconitine poisoning. Clinical Toxicology, 1993. 31(1): p. 133-138.

117. Martin, B., et al., Toxicity of Cassia occidentalis in the horse. Veterinary and Human Toxicology, 1981. 23(6): p. 416-417.

118. McLennan, M. and M. Amos, Treatment of lantana poisoning in cattle. Australian Veterinary Journal, 1989. 66(3): p. 93-94.

119. Meijer, P., P. Coenraads, and B. Hausen, Allergic contact dermatitis from hydrangea. Contact dermatitis, 1990. 23: p. 59-60.

120. Meijer, W., Podophyllum peltatum- may apple: a potential new cash crop plant of Eastern North America. Economic Botany, 1974. 28: p. 68-72.

121. Molyneux, R. and L. James, Loco Intoxication: Indolizidine alkaloids of spotted locoweed (Astragalus lentiginosus). Science, 1982. 216(4542): p. 190-191.

122. Molyneux, R. and M. Ralphs, Plant toxins and palatability to herbivores. Journal of Range Management, 1992. 45(1): p. 13-18.

123. Moxley, R.A., et al., Apparent toxicosis associated with lily-of-the-valley (Convallaria majalis) ingestion in a dog. Journal of the American Veterinary Association, 1989. 195(4): p. 485-487.

124. Neuss, N., A new alkaloid from Amianthium muscaetoxicum Gray. Journal of the American Chemical Society, 1953. 75: p. 2772-2773.

125. Nishie, K., M. Gumbmann, and A. Keyl, Pharmacology of Solanine. Toxicology and Applied Pharmacology, 1971. 19: p. 81-92.

126. Odriozola, E., et al., An outbreak of Vicia villosa (Hairy vetch) poisoning in grazing aberdeen angus bulls in Argentina. Veterinary and Human Toxicology, 1991. 33(3): p. 278.

127. Oelrichs, P.B., et al., Toxic tetranotriterpenes of the fruit of Melia azedarach. Phytochemistry, 1983. 22(2): p. 531-534.

128. Ogden, L., Taxus (Yews) - a highly toxic plant. Veterinary and Human Toxicology, 1988. 30(6): p. 563-564.

129. Olsnes, S., K. Refsnes, and A. Pihl, Mechanism o faction of the toxic lectins abrin and ricin. Nature, 1974. 249: p. 627-631.

130. Olszowsky, D.R., Of Bees, Rhododendrons and Honey. American Bee Journal, 1977. 117: p. 498-500.

131. Palatnick, W. and M. Tenenbein, Hepatotoxicity from Castor Bean Ingestion in a Child. Clinical Toxicology, 2000. 38(1): p. 67-69.

132. Panciera, R., et al., Acute oxalate poisoning attributable to ingestion of curly dock (Rumex crispus) in sheep. Journal of the American Veterinary Medical Association, 1990. 196(12): p. 1981-1984.

133. Panciera, R., D. Mosier, and J. Ritchey, Hairy vetch (Vicia villosa Roth) poisoning in cattle: update and experimental induction of disease. Journal of Veterinary Diagnostic Investigation, 1992. 4: p. 318-325.

134. Panter, K., R. Keeler, and D. Baker, Toxicosis in livestock from the hemlocks. Journal of Animal Science, 1988. 66: p. 2407-2413.

135. Panter, K., et al., Larkspur poisoning: toxicology and alkaloid structure-activity relationships. Biochemical Systematics and Ecology, 2002. 30: p. 113-128.

136. Parkinson, S., Suspected privet poisoning. Veterinary Record, 1986. 119: p. 483-484.

137. Peet, R. and J. Gardner, Poisoning of cattle by hairy or woolly-pod vetch, Vicia villosa subspecies dasycarpa. Australian Veterinary Journal, 1986. 63(11): p. 381-382.

138. Perez-Castorena, A., et al., Alkaloids from three Senecio species. Biochemical Systematics and Ecology, 1999. 27: p. 835-837.

139. Pfister, J., et al., Management of three toxic Delphinium species based on alkaloid concentrations. Biochemical Systematics and Ecology, 2002. 30: p. 129-138.

140. Phillips, B., et al., A study of the toxic hazard that might be associated with the consumption of green potato tops. Food and Chemical Toxicology, 1996. 34: p. 439-448.

141. Pierce, K., et al., Acute hemolytic anemia cause by wild onion poisoning in horses. Journal of the American Veterinary Medical Association, 1972. 160(3): p. 323-327.

142. Piercy, P. and L. Rusoff, Crotalaria spectabilis poisoning in Louisiana livestock. Journal of the American Veterinary Medical Association, 1946. 108: p. 69-73.

143. Pittler, M.H. and E. Ernst, Horse-Chestnut Seed Extract for Chronic Venous Insufficiency. Archives of Dematology, 1998. 134: p. 1356-1360.

144. Plumlee, K., Red maple toxicity in a horse. Veterinary and Human Toxicology, 1991. 33(1): p. 66-67.

145. Plumlee, K., et al., Nicotiana glauca toxicosis of cattle. Journal of Veterinary Diagnostic Investigation, 1993. 5: p. 498-499.

146. Powell, R., R. Plattner, and M. Suffness, Occurrence of Sesbanimide in Seeds of Toxic Sesbania Species. Weed Science, 1990. 38: p. 148-152.

147. Prince, L.A. and C.M. Stork, Prolonged Cardiotoxicity form Poison Lily (Veratrum viride). Veterinary and Human Toxicology, 2000. 42(5): p. 282-285.

148. Pullar, E., Studies on five suspected poisonous plants. Australian Veterinary Journal, 1939. 15: p. 19-23.

149. Radford, D., et al., Naturally occurring cardiac glycosides. The Medical Journal of Australia, 1986. 144: p. 540-543.

150. Rae, C. and B. Binnington, Anaranthus retroflexus (redroot pigweed) poisoning in lambs. Canadian Veterinary Journal, 1995. 36: p. 446.

151. Ralphs, M. and L. James, Locoweed grazing (Abstract). Journal of Natural Toxins, 1999. 8(1): p. 47-51.

152. Rauber, A. and J. Heard, Castor Bean Toxicity Re-Examined: A New Perspective. Veterinary and Human Toxicology, 1985. 27(6): p. 498-502.

153. Roberge, R., et al., The Root of Evil - Pokeweed Intoxication. Annals of Emergency Medicine, 1986. 15: p. 470-473.

154. Robinson, G., et al., Evaluation of the Toxic Effects of the Legumes of Mimosa (Albizia julibrissin) and Identification of the Toxicant, in Toxic plants and other natural toxicants, T. Garland and A. Barr, Editors. 1998, CAB International: New York. p. 453-458.

155. Rodgers, G.C. and R.L. Von Kanel, Conservative treatment of Jimsonweed Ingestions. Veterinary and Human Toxicology, 1993. 35(1): p. 32-33.

156. Rogers, R., J. Gobson, and K. Reichmann, The toxicity of Cassia occidentalis for cattle. Australian Veterinary Journal, 1979. 55: p. 408-412.

157. Rondeau, E., Wisteria Toxicity. Clinical Toxicology, 1993. 31(1): p. 107-112.

158. Russell, L., W. Schwartz, and J. Dollahite, Toxicity of Chinese Tallow Tree (Sapium sebiferum) for ruminants. American Journal of Veterinary Research, 1969. 30(7): p. 1233-1238.

159. Sargison, N., et al., Prunus padus (bird cherry) poisoning in cattle. The Veterinary Record, 1996. 138: p. 188.

160. Scott, I.U. and C.L. Karp, Euphorbia sap keratopathy: four cases and a possible pathogenic mechanism. British Journal of Ophthalmology, 1996. 80: p. 823-826.

161. Seaman, J., M. Smeal, and J. Wright, The possible association of a sorghum (Sorghum sudanese) hybrid as a cause of developmental defects in calves. Australian Veterinary Journal, 1981. 57: p. 351-352.

162. Seawright, A., Directly toxic effects of plant chemicals which may occur in human and animal foods. Natural Toxins, 1995. 3: p. 227-232.

163. Seiber, J., C. Nelson, and S. Lee, Cardenolides in the latex and leaves of 7 Asclepias species and Calotropis-procera. Phytochemistry, 1982. 21(9): p. 2343-2348.

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