134 PEACH LEAF POISON BUSH. 



The transitory appearance of hydrocyanic acid has been 

 noted l)y Greshoff^^ in Hych'angea and certain ferns, and 

 its periodicity in economic plants of the Sorghnm group 

 is well-known. 



Similar occurrence of the poison, as here shown, in Trema 

 aspera in sufficie?it amount in certain situations or at certain 

 seasons is in accord with the sporadic and sudden fatalities 

 occasionally observed among stock grazing where the plant 

 is abundant. 



REFERENCES. 



1. Bailey, F. M., and Gokdox, P. R. Plants Reputed Poisonous and 



Injurious to Stock, 1887, p. 93. 



2. EwART, A. J., and Tovey, J. R. Weeds, Poisonous Plants and 



Naturalised Aliens of Victoria, 1909, p. 36. 



3. Maidex, J. H. Agricultural Gazette of N.S.W., Vol. VIIL, 1897, 



p. 19. 



4. Maiden, J. H., Agricultural Gazette of N.S.W., Vol. XIL, 1901 



p. 663. 

 o. Greshoff, M. Beschrijving der giftige en bedwelmende planten 

 bij de vischvangst in gebruik (Tweede gedeelte) Mededeelingen 

 uit 's Lands Plantentuin, XXIX (1900), p. 145. 



6. Ban'ckoft, T. L. Research into the Pharmacologj' of Some 



Queensland Plants, 1 888, p. 2. 



7. Francis, W. D. Queensland Agricultural Journal, Vol. XIII. n.s., 



1920, p. 70. 



8. Cleland, J. B. Third Report, Bureau of Microbiology-, Sydney 



1912, p. 198. 



9. Greshoff, M. Brit. Ass. Adv. Sc, York, 1906, pp. 138-144. 



10. Greshoff, M. Bull. Sc. Pharm., 1906, pp. 589-602. 



11. Smith, F., and "White, C. T. Proc. Royal Soc. Queensland, Vol. 



XXVIL, 1920, pp. 89-91. 



On account of the faint positive reactions recorded for the plant 



at the time it was not here recorded as definitely cyano])horic. 



12. Greshofi-, M. Kew Bull., 1909, p. 411. 



