. Bulletin of the Department of Agriculture. Agriculture; Agriculture. jrw^'^w' Washington, D. C. PROFESSIONAL PAPER September 8, 1916 LARKSPUR POISONING OF LIVE STOCK. By C. DwiGHT Maesh and A. B. Clawson, Physiologists, Poisonous Plant Investigations, Bureau of Plant Industry, and Hadleigh Maksh, Veterinary Inspector, Bureau of Animal Industry. CONTENTS. Introductory: Page. Historical summary and review of litera- ture 1 The alkaloids of delphiniums i Losses from larkspur poisoning 11 Common names of larkspurs 13 Species of delphinium concerned in lark- spur poisoning Detection of la
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. jrw^'^w' Washington, D. C. PROFESSIONAL PAPER September 8, 1916 LARKSPUR POISONING OF LIVE STOCK. By C. DwiGHT Maesh and A. B. Clawson, Physiologists, Poisonous Plant Investigations, Bureau of Plant Industry, and Hadleigh Maksh, Veterinary Inspector, Bureau of Animal Industry. CONTENTS. Introductory: Page. Historical summary and review of litera- ture 1 The alkaloids of delphiniums i Losses from larkspur poisoning 11 Common names of larkspurs 13 Species of delphinium concerned in lark- spur poisoning Detection of larkspur species in stomach contents Experimental work: The station at Mount Carbon, Colo The station at Greycliff, Mont Experimental feedtag of cattle Poisoning of horses by larkspur Experimental feediag of sheep 14 16 Results and conclusions: Animals affected by larkspur Symptoms of larkspur poisoning The toxic dose of larkspur Post-mortem features of larkspur poison- ing Toxicity of different parts of the Age of plants affecting toxicity Treatment of cases of larkspur poisoning. Methods of prevention General summary Literature cited in this paper Index to species of plants Index to experimental feeding of PART I.—INTRODUCTORY. HISTORICAL SUMMARY AND REVIEW OF LITERATURE. There is somewhat extensive literature in regard to the larkspurs. In this summary and review only the more important and significant publications are noted, with especial reference to those that treat of the poisoning of domestic animals. The larkspurs have been known from very ancient times as poisonous and medicinal plants. Under the names crrac^ts aypla of Dioscorides and Hippocrates, ayporkpT] crTals of Nicander, Astaphis agria or /Staphis of Pliny, and Herba pedicularia of Scribonius Largus, was probably recognized the species Delphiniwn stapMsagria L. Under the narile Consolida regalis were probably included several species. The question of the identity of the species n
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