The outer slopes of the hills about Milhaïn were scantily clad with a meagre vegetation, in which a woolly variety of _Ononis Natrix_, _Helianthemum virgatum_, some variety of the ubiquitous _Teucrium Polium_ and _Macrochloa tenacissima_ were the prevailing species; and the attempts at tillage seemed to produce only miserable crops of barley. We expected to find more variety on the rocks which were before us, and were not altogether disappointed; but the season was already far advanced, and the spring vegetation partially dried up. Along the dry bed of the streamlet, that is probably filled only after heavy rain, we gathered _Euphorbia pinea_, not before seen in Marocco. On the dry rocks we found a curious form of _Coronilla viminalis_, reduced to a stunted bush, scarcely two feet high, with its curious jointed pods, four or five inches in length. A range of quite vertical crags was almost covered with two peculiar plants of this region—_Euphorbia rimarum_, of Cosson, and _Andrachne maroccana_, of Ball. The latter, though abundantly different in structure, has much the habit of _A. telephioides_, the wide-spread Mediterranean species. In a crevice of these rocks a single small specimen of the rare fern, _Asplenium Petrarchæ_, was also found. The hill opposite that which we ascended was crowned by a fort, similar in character to those which we had seen elsewhere on the skirts of the Atlas, to which our Shelluh guide gave the name Taganagurt. Our involuntary change of route prevented us from ascertaining whether these extend westward along the northern base of the mountains in the direction of Agadir, but this is probable. Future travellers may be able to ascertain more about them than we were able to do. To whatever date their construction be referred, it is clear that they were erected either by the people inhabiting the low country to restrain the incursions of mountain tribes, or by the latter to repel attacks on their independence, the former being, in our opinion, the more probable opinion.