Beetroot, or mangold wurzel, is another example of garden and field produce which is subject to a similar visitation. This rust often has very red spores when produced on red varieties of beet. During September, 1863, it (_Trichobasis Betæ_, Lev.) was sent us on the leaves of the wild beet (_Beta maritima_). All the species of _Polygonum_ are exceedingly subject to the attacks of the Persicaria rust (_Trichobasis Polygonorum_, B.), which nearly covers the leaves, till the entire plants seem to be smothered in Scotch snuff. If it were allowable to affirm of any plants that they are martyrs to parasitism, such might be said of the Persicarias and their allies. [Illustration: Plate VIII. W. West imp. ] Sedges are subject to the attacks of a rust much resembling the corn rust. When it occurs on some species of _Carex_, the upper surface of the leaf has corresponding pale spots, and the pustules themselves are surrounded by a yellowish margin. This species (_Trichobasis caricina_) is far from uncommon (Plate VIII. figs. 170, 171). The sedge-like plants belonging to the genus _Luzula_ have also their own species of rust (_Trichobasis oblongata_), the spores of which are deeper in colour than in the sedge rust (Plate VII. figs. 158, 159). Amongst the remaining species of _Trichobasis_ (the reader must pardon our using the generic name, as we have no equivalent), that found on the leaves of various composite plants is the most common (_Trichobasis Cichoracearum_, Lev.). It occurs on some thistles, on the saw-wort, dandelion, several species of hawkweed, and similar plants. The pustules are small and more diffused than in the species found on _Cnicus arvensis_, and they as often appear on the upper as on the lower surfaces of the leaves. On umbelliferous plants three species are recorded; one with yellow spores (_Trichobasis Petroselini_, B.); another with a blistered habit, and brown, ovate, or oblong spores (_T. Umbellatarum_, Lev.); and a third with tawny, obovate, or egg-shaped spores (_T. Heraclei_, B.), which is found solely on the cow-parsnip. The species of _Puccinia_ corresponding to some of these species of _Trichobasis_ are known, but, in other cases, probability, or speculation if you please, occupies the place of knowledge.