156. _Plant in Texas._--I shall be glad to learn the scientific name of
the plant to which the following extract from the _Athenæum_ (1847, p.
210.) refers:--
"It is a well-known fact that in the vast prairies of Texas a
little plant is always to be found which, under all circumstances
of climate, changes of weather, rain, frost, or sunshine,
invariably turns its leaves and flowers to the north," &c.
[Hebrew: A. T.]
157. _Discount._--Can any of your readers inform me how discount
originated, and where first made use of?