As we gradually wound upwards, and the Aït Mesan valley was finally lost to view, we found that, instead of reaching a pass whence we should descend into an adjoining valley more or less parallel to that which we had left, the country before us was an undulating plateau, extending over a space of many miles, through which no stream runs from the higher mountains towards the plain. This plateau does not subside gradually towards the low country as might have been expected; for at almost every point we found higher ground lying between us and the plain, in the form of rounded eminences, rising some three or four hundred feet above the plateau. The soil was calcareous, and the underlying pale limestone cropped up here and there; but the stratification appeared very irregular. In some places we noticed bosses of intrusive igneous rock of dark colour. Though no villages were in sight, most of the surface was under rude tillage; but the fields were gay with a multitude of wild species in full flower. After the excitement of the preceding days, the afternoon ride seemed uneventful in a botanical sense, as we failed to find much that was altogether new. The most interesting forms were several fine _Orobanches_, which might here be studied with profit by a traveller less pressed for time than we were. A great feast of colour was presented to us as we approached Sektana, our camping place, by a magnificent new _Linaria_, of which we had hitherto seen only stunted and starved specimens. In some fields of corn not yet in ear, the spikes of numerous dark crimson flowers all but concealed the green, and gave to the surface a tone of subdued splendour. The plant has been described by Hooker, in the _Botanical Magazine_ (vol. 98, No. 5983), as _Linaria Maroccana_. The artist, who had not seen the wild plant, has failed to attain the rich tint of the native flowers. In cultivation, the colour loses its original depth, and in some gardens it has faded to a pale purple or violet tint. From this, and other differences shown in cultivation, it seems possible that this may be an extreme form of _Linaria heterophylla_ of Desfontaines, a plant so different in appearance that, at first sight, no one would suspect very near relationship between them.