Without loss of time, we sallied forth with our portfolios, attended by one of the soldiers who was supposed to watch over our safety, and directing our steps to a dry river-bed that winds through the plain close by, were rewarded for our self-denial by finding a number of interesting plants not before seen. The most conspicuous of these was a _Tamarix_, which in some places grew thickly near the banks. It is remarkable for the bright pink colour of the seed vessel, and differed much in general aspect, though not widely in structure, from the common _T. gallica_. The river-bed is probably the natural channel of the stream that flows below Tasseremout, part of which is diverted into irrigation channels, but during rainy weather resumes its original course. As the sun declined the clouds cleared away from the higher ridges of the Atlas, of which we enjoyed the finest view we had yet attained. Nearly due east and thence bearing towards ESE., was a group of high summits which, to judge from several large patches of snow, must be quite as lofty as that nearer to us. Between this, which belongs as we believe to the district called Glaoui, and the nearer range it was clear that a considerable valley runs deep into the chain. The drainage of this valley must flow to the Oued Tensift; but whether that be the main eastern branch of the river, or an affluent not indicated on the maps, is as yet uncertain. After dinner, we adjourned from our tent to pay our promised visit to the Kaïd, who, according to custom, had green tea served in a small low room, which was reached through intricate passages. As a matter of course, the object of our journey was the chief topic of conversation. Among other plants we spoke of the _furbioun_,[3] or _Gum Euphorbium_, which we knew to be produced by a cactoïd _Euphorbia_ that grows about the base of the Great Atlas, east of the city of Marocco. Concurrent native testimony fixes the province of Demenet as its chief home; and it must be very rare, or altogether absent, in the districts traversed by us, as it is scarcely possible that it should have been overlooked. Apparently conciliated by some trifling presents, the Kaïd informed us that he had in his garden some plants brought from Demenet, and offered one of these, which was safely forwarded to Kew, as a gift to Hooker.