Mr. Brown, on the "Proteacccc of Jussieu. 41 



where the essential generic characters are nearly the same as in 

 the sixth, and the specific characters are copied from the Species 

 Plantarum. 



Of this latter work the second edition appeared in I762 : it 

 contains two additional species of Leucadendron described from 

 Burmannus's Collection and Plantae Africanae : Protca argentea 

 of the first edition is here divided into two species; the first 

 Pj-otea argentea now so called, the second comprehending P. sa- 

 ligna, conifera, and three other nearly related species : to this latter 

 the greater part of the observation added to P. argentea of the 

 first edition is annexed, though evidently less applicable to the 

 species thus divided. 



In the sixth edition of Genera Plantarum printed in 1764 no 

 alterations are made in the characters of these two genera. 



In Mantissa prima published in I767, two new species of 

 Leucadendron are described : neither of these, however, he had 

 in his Herbarium: the first, Leucadendron speciosum, he had pro- 

 bably accidentally seen, the antherae of which are described as 

 filaments, and their callous apices alone as true antherae : the 

 description of the second, L. pinifolium, is by Van Royen. 



In the twelfth edition of Systema Naturae published in the 

 same year, the species of Leucadendron are arranged in a diffe- 

 rent, and, as the author intended, a more natural order ; from 

 which it may be concluded that at this time considerable addi- 

 tions had been made to his Herbarium: but L. glomeratum is un- 

 accountably omitted. Protea here receives again P. Levisamts, 

 the P. fusca of the first edition of the Species Plantarum, which 

 in the second had been referred to Brunia. 



In Mantissa altera published in 1771, the two genera are 

 united under the name of Protea ; new characters are given to 



VOL. X. G the 



