The general colour is deep liver-brown, silvered or frosted with the hoary tips of the longer stiff hairs.
Ilex, usually a smaller tree, frequently of rather shrub-like appearance, with abundant glossy dark-green leaves, generally ovate in shape and more or less prickly at the margin, but sometimes with the edges entire; the under surface is hoary; the acorns are oblong on short stalks.
Pilocereus, the old man cactus, forms a small genus with tallish erect, fleshy, angulate stems, on which, with the tufts of spines, are developed hair-like bodies, which, though rather coarse, bear some resemblance to the hoary locks of an old man.
P. Russelliana (lunariaefolia), 4 ft., yellow, and P. tuberosa, 3 ft., purplish-rose, both with downy hoary leaves, come in well in broad flower borders.
It is safe to say that no prehistoric monument in Great Britain has given rise to more speculation as to its origin, date and purpose; and although the few hoary stones still extant are but a small portion of the original structure they are still sufficiently imposing to excite the wonder of the passing traveller, and mysterious enough to puzzle the antiquary.