Miss Hunter says: " If A. B. will refer to page 127 of the second volume of Barton's Medical Botany, he or she will find the following statement: ' Most of the species of Eupatorium, of which Willdenow enumerates seventy-one, are indigenous to America. Those indigenous to our State are all plain-looking plants, except E. ccelestinum.'

"I suppose there is a different classification, since, as Gray gives Conoclinium under sub-tribe 1, Eupatoriae, and under that head describes C. coelestinum.

" I can only say, that the blue Eupatorium, sometimes called Ageratum,' may be a greenhouse plant with A. B., but something very closely resembling it is a native plant with us. It is useless to confirm the assertion already made that E. Hunter is no botanist".

[We usually allow considerable latitude to our correspondents, and it is well understood that because we admit anything into our columns, it does not follow that we approve either of the matter or manner of the writer. We may, however, say here for the comfort of our fair correspondent, that though making no pretensions as a botanist, she need not be worried at not readily seeing the difference between Ageratum Conoclinium, Eupatorium, Coelestina, and perhaps other genera, for botanists of high repute have so tossed the species about from one to another that one hardly knows what is right or wrong about them. At present (it is only safe to say this, for no one knows how long it will be so) the blue greenhouse plant is Ageratum Mexi-canum, and the hardy one, much like it in appearance, is Conoclinium coelestinum. As Miss Hunter truly says, they have all been Eupato-riums in the past. - Ed. G. M].