VOL. Iv.] Recent Literature. 299 
Synonymy of C. glauca, but the second species C. maritima 
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 Dovexas 
HouGuton CampBELL. Extract from Annals of Botany, pp. 
155-187, with three excellent double plates. 
Index Kewensis an Enumeration of the Genera and Species of 
Flowering Plants, from the Time of Linnaeus to the year 1885 
Inclusive, Together with Their Authors’ Names, the Works in 
Which They Were First Published, Their Native Countries, and 
Their Synonyms. By B. Daypon Jackson, Part /, A. Den. 
1893-* This monument of Mr. Jackson’s untiring industry is 
absolutely essentiai 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 
Aphantocheta 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- 
tember 8, and received at the library of the California Academy of Sciences 
about the end of that month. 
