306 
ON ANNUAL AND BIENNIAL HYOSCYAMUS. 
oscyamus. I am now not surprised that authors should dis- 
agree respecting the duration of this plant. Thus we see in 
Alston, " the black (henbane ) is always biennial; Bergius, 
biennis; J. A. Murray, biennis. 99 In Smith, Hooker, Dun- 
can, &c, annual. 
I am not at present able to determine the botanical relation 
of the annual to the true hyoscyamus niger in its degree of 
affinity, nor am I able to give any information respecting the 
difference in the medicinal properties of these two plants — 
these are two important points, and deserve to be care- 
fully investigated; and I hope before next season we shall 
be in possession of that knowledge, by the labors of some 
who are competent to carry on the inquiries in a proper 
manner. 
London Pharm, Transactions. 
