154 EXPLOITATION OF PLANTS 
Little has been done, however, as yet in the light of 
the more exact possibilities of Mendelian breeding. It 
is affirmed, however, that the biennial varieties of 
Hyoscyamus niger are Mendelian in their behaviour, 
so that pure strains can be isolated—a fact of great 
importance to the drug trade. 
Prof. Bayley Balfour writes: “‘ There is undoubtedly 
room for heaps of work in the matter of drug plants,” 
and Mr. Bateson informs me that there is some reason 
to stippose that scent-bearing and non-scent-bearing 
characters behave in a truly Mendelian manner. 
These indications justify, nay, demand an output of 
capital and labour commensurate with their significance, 
in the sure hope of an ultimate reward, both scientific 
and humanitarian. 
REFERENCES 
1. Royal Commission on Resources and Trade of the Dominions. 
2. A. D. Hatt, Agriculture after the War. ~ 
3. L. H. Bartey, Plant Breeding, 1906. 
4. FLUCKIGER and Hansury, A History of Drugs. 
5. SouTHALL, Materia Medica. 
6. A. B. TEETGEN, Profitable Herb Growing and Collecting. 
7. A.R. Cusuny, Therapeutics. 
