The amount of drought some plants will bear with impunity is surprising. Dr. G. Schweinfurth, in Petermann's Mittheilungen, gives an account of his recent journey across the Arabian desert, from Heluan to Qeneh, and mentions some interesting facts concerning the vegetation. In Wady Qeneh, he states, no rain had fallen for six years, but some Acacias and Tamarisk were still green and flourishing, and apparently unaffected, whilst the last traces of herbaceous plants had disappeared. In a more favored part he found the valleys covered with Salvia palaestina, a very handsome species, three feet high, with a profusion of sky-blue flowers.