the mountain region of Asia Minor and Syria, and which strangely reappears here and there among the low hills between Tarifa and Algeciras, on the north side of the Straits, has not been found on the African shore; but until the coast between Tangier and Ceuta has become more accessible, it will not be safe to assume that it is wanting. Among the many shrubby leguminous plants whose flowers give the prevailing golden tint to the hill sides, two of the Broom tribe (_Genista triacanthos_ and _Cytisus tridentatus_), plants of very peculiar aspect and characteristic of this region, attracted our attention. It is impossible to omit another ornament of the hills—a plant rather widely diffused but nowhere common (_Lithospermum fruticosum_), whose azure blue flowers formed a charming contrast with the surrounding masses of golden colour. The botanical district to which the northern corner of Marocco belongs has been already called that of the Cistus and Heath, but no single species of those tribes exactly conforms to the limits above pointed out. There are, however, several less conspicuous plants whose distribution more closely agrees with those limits. The most singular of these is the _Drosophyllum lusitanicum_, a plant of the sun-dew tribe, whose branched stem bears several large yellow flowers. The numerous slender strap-shaped root-leaves, nearly a foot in length, that are gradually contracted to the thickness of whipcord, are beset with pellucid ruby-tipped glands, and present a peculiarity that appears to be unique in the vegetable kingdom. Any one who has remarked the growth of ferns must have seen that in the young state the leaves are rolled or curled inwards, so that in the process of unfolding the face or upper side of the leaf, which was at first concealed, is gradually opened and turned to the light. A similar process occurs in many other plants; but in _Drosophyllum_ alone, so far as we know, the young leaf is rolled or curled the reverse way, so that the upper side of the leaf is that turned outwards. It appears to grow in many parts of Southern Portugal; reappears on the north side of the Straits of Gibraltar near Tarifa and Algeciras, and on the southern side about Cape Spartel and on the hills above Tetuan, where it commands a view of the opening of the Mediterranean, but extends no farther eastward. Very similar is the distribution in Europe of two ferns whose natural home seems to be in the Canary Islands—the graceful _Davallia canariensis_, and the _Asplenium Hemionitis_ of Linnæus. Both occur here and there in shady spots, from the rock of Lisbon to Algeciras and Tangier, but are unable to travel eastward beyond the Pillars of Hercules.