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 26 ON THE PROTEACE^E OF JUSSIEU.

while engaged in the arrangement of Van Royen's collec- tion, another fluctuation of opinion occurs, Protect being limited as in the first edition of the Genera Plantarum, and to Leucadendros, which here for the first time occurs, he refers the Conocarpodendron of Boerhaave.

In 1740 he published the second edition of Systema Naturae, where the names Protect and Leucadendron are both given ; but the references to Boerhaave are reversed, Protea being confined to his Conocarpodendron, and Leu- cadendron comprehending his other two genera. In this sense they also appear in the second edition of the Genera Plantarum published in 1742, in which the character of Leucadendron is first given, some of whose species he must, from the annexed asterisk, have seen recent : his description of corolla and pistillum is only applicable to Lepidocarpodendron.

In 1745 Linnaeus received the Herbarium of Hermann, from which he composed his Flora Zeylanica : the fourth volume of this collection containing a mixture of Ceylon and African plants, the latter are not noticed in this work ; bat from an inspection of the Herbarium itself, now in the Banksian collection, it appears that he had added generic names to most of them : of Proteae only three species exist in the volume, of which Protea conoearpa is one : of this there are on the same page two specimens, whose heads of flowers are separately pasted ; under one of these specimens he has written Leucadendron, and under the second Pro- tea; to a specimen of Protea Serraria on a different 40] page he has given the name of Santolina. These facts are mentioned to prove, that at this period his knowledge of the family must have been chiefly derived from Boerhaave' s figures, and perhaps from specimens which he had casually seen.

In 1748 the sixth edition of Systema Naturae appeared, where the essential characters of Protea and Leucadendron first occur, both of them evidently derived from the natural characters previously given.

In 1753 the Species Plantarum, the most accurate of all his w T orks, w r as given to the world; both genera are found

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