VOL. i\.] Recent Literature. 299 



synonj'my of C. glauca, but the second species C. niaritima 

 described from the same clump is not mentioned. Probably it 

 was published too late to find its proper place. 



The continual change of names with which we are afflicted at 

 present has led to the printing of the text of Ardisia Pickeringia 

 as Icacorea and the plate as Bladhia, and as the synonymy is 

 given in the Index Kewensis there are yet two older names for 

 someone to adopt. 



The Development of Azolla filiculoides Lam. By Douglas 

 Houghton Campbell. Extract from Annals of Botany, pp. 

 155-187, with three excellent double plates. 



Index Kezvensis an Einuneration of the Genera and Species of 



Flowering Plants, from the Time of Linnceus to the year 188^ 



Inclusive, Together with Their Authors' Names, the Works in 



Which They Were First Published, Their Native Countries, and 



Their Synonyms. By B. Daydon Jackson, Part /, A. Den. 



1893.* This monument of Mr. Jackson's untiring industry is 

 absolutely essential to every systematic botanist. The remain- 

 der is promised before the end of the next year. The only- 

 serious fault is in the matter of dates, which seem to follow 

 no settled rule. The inconvenience is, however, more apparent 

 than real as every botanical writer does or should verify his 

 dates, and it would, by making it so very easy, probably greatly 

 stimulate the practice already far too common of taking up the 

 older names without consideration of the sufficiency of their 

 publication. Undoubtedly errors and omissions will be found in 

 the course of use, but the work bears evidence of great 

 care, the only error in date so far observed by us is in 

 AphantocJueta which is given as 1856, and in " addenda and 

 emendata" as 1836. The date on the title page of the part where 

 it occurs is 1857. The good sense and modesty shown in 

 refraining from coining new names, in cases where two valid 

 species bore the same name is in refreshing contrast to the 

 practice of Steudel and a few recent botanists tormented by an 

 itching vanity. The species considered valid are printed in 



* The exact date is not given but a copy was mailed in London Sep- 

 tembers, and received at the library of the California Academy of Sciences 

 about the end of that month. 



