FLORA OV TKOPICAL AFRICA 109 



much more numerous in Tropical African species than are Labiahe ; 

 and of the orders not yet done for the Flora it may be granted that 

 Gnunine(£, Ctjperacece, and probably EuphorhiacecB will have a higher 

 enumeration than Lahintie ; it thus appears that Labiatte really take 

 •a place not higher than ninth in the Flora. 



As an illustration of the accelerated rate of progress in African 

 botany, it may be stated that the orders UmheUiferw and Araliaceie 

 were prepared for the second volume of the Flora, but were crowded 

 out; they were, in fact, printed off in 1873, with the heading and 

 pagination ready for the succeeding volume, and the sheets remained 

 unpublished for more than six years, until in 1877 the third volume 

 appeared, and then they formed the beginning of it. Notwith- 

 standing this long delay, one only of the new species which were 

 described in it had in the meantime been published under another 

 name, and only one new species would have required incorporation 

 in order to bring the work up to date. 



The number of new species of Lahiatcc now published by Mr. 

 Baker is 122, besides 52 previously published by him ; the number 

 of species ascribed to Dr. Giirke is 121, and that to Dr. Briquet is 

 83, and there are several species due to other botanists of the 

 present day, while only 25 are ascribed to Bentham, and 11 to 

 Liunsus ; it is thus seen to what a great extent the Flora is 

 indebted to recent research. The number of endemic species 

 appears to be 508, only 63 being mentioned as occurring also 

 outside the limits of the Flora. It is obvious that much material 

 remains unexplored and waiting to reward further search ; for one 

 of the six great divisions into which Tropical Africa is divided for 

 the purpose of the Flora — namely, the North Central region — is not 

 credited with even one species ; this region is bounded on the north 

 by the Tropic of Cancer, on the west by the Atlantic Ocean, on the 

 east by the twenty-sixth meridian of east longitude, and on the 

 south by the Upper Guinea region and the Congo Free State. As 

 to the other five regions, Upper Guinea is cited for 63 species, 

 Nile-land for 202, Lower Guinea for 124, South Central for 40, and 

 Mozambique for 247. 



The care that has been taken to bring together in regular 

 sequence all the plants of the order belonging to the Flora cannot 

 fail to prove a great benefit ; it is indeed carrying out the main 

 purpose of the work, and very little has escaped Mr. Baker. Two 

 species, however, are omitted, namely, Plectranthus hereroensls Engl. 

 Bot. Jahrb. x. p. 267 (9 Oct. 1888), and Leucas Ruspolmna Giirke 

 in Engl. Bot. Jahrb. xxii. p. 134, n. 22 (19 Nov. 1895). 



The following three names, which have been published in con- 

 nection with Tropical African botany, are not quoted : — 



Ocimiim longistylum Hochst. in PL Schimp. Abyss, iii. n. 1599 ; 

 this, according to Schweinf. Beitr. Fl. .Ethiop. p. 125 (1867), is 

 synonymous with 0. mentkifolmm Hochst. 



Salvia utilis A. Br. in Karlsrh. Saamenkat., 1841 ; this, according 

 to Schweinf. I.e. p. 127, is synonymous with S. nudicaitlis Vahl. 

 In the National Herbarium there is a specimen from A. Braun, 

 grown in the Carlsruhe garden from Abyssinian seeds. 



