be so evidently its character in northern climates, 
for it is asserted that the opium of Eygpt is stronger 
than any produced north of the Mediterranean ; that 
the Turkish is stronger than French; and French 
than English. This opinion must, however, be re- 
ceived with caution, for in this country, opium has 
been produced, which was proved to contain all the 
narcotic properties of the foreign drug, and that too, 
without its impurities. 
The influence of climate on the medicinal quali- 
ties of some vegetables, has been incontrovertibly 
proved to be great. Dr. Paris says that, “Senna 
by transplantation from Arabia into the south of 
France (Provence) assumes a marked change in its 
physiognomy and virtues, its leaves are more obtuse, 
and its taste less bitter and nauseous than the pointed 
leaved variety, while its effects will be found to be 
less purgative. Cruciform plants degenerate within 
the tropics, but acquire increased energies, as Antis- 
corbutics, in cold regions; the Menthse have not so 
penetrating an essential oil in the south of Europe as 
in England and in the north of France. The relative 
proportions of gluten vary in the wheat of different 
countries, and as in the south of Europe, its quantity 
greatly predominates over the other principles, we 
at once discover the cause that gives such excellence 
to the Maccaroni of Italy. Many species of plants 
secrete juices in warmer regions, which are unknown 
in their (economy, in colder climates ; thus the Ash 
yields Manna in Calabria, but loses that faculty as it 
advances towards the north.” 
Glaucium phoeniceum is a doubtful native. It may- 
be sown in the borders in April. 
Hort. Kew. 2, v. 3, 288. 
