42
Poisonous Plants of the United States and Canada
John M. Kingsbury · Soil Science · 1964 · 871 citations
Pharmacy, Botany, Toxicology +13
E. Milne‐Redhead, R. M. Polhill · Taxon · 1971 · 847 citations
INTERNATIONAL CODE OF BOTANICAL NOMENCLATURE
Taxon · 1953 · 831 citations
Life Sciences, Botany, Plant Biology +12
N. W. Simmonds, J. W. Purseglove · Journal of Ecology · 1969 · 799 citations
L. H. Bailey · 1949 · 713 citations