From what we have already seen of this plant, we regard it as the finest silvery-foliaged plant for general usefulness outdoors that has ever been introduced. When it can be said of it that it is a hardy perennial, and a miniature as near as possible of Centaurea Ragusina, forming lovely compact specimens G inches across, with compact stiff leaves as white as those of the Centaurea, and like them in all respects except size, little more need be said in its favour. It was brought from the Pyrenees by Messrs Backhouse of York, who sent a special expedition for it, who seem to think it does best in loamy soil, though it grows wild in a loose shaly soil. It multiplies itself by its "woody stem branching and rooting as it travels on." At present our stock of it is in pots, and from what can be seen of it in that state, and from what we have heard of it outdoors much farther north, it cannot fail to be a great favourite.