168 



PHYTOGRAPHY. 



the very summit of art in his incomparable representations of 

 Mosses. 



These examples of our predecessors should be imitated by 

 us ; and we should recollect, that science ought not to be 

 subservient to the luxury of the great, but should be commu- 

 nicated even to those who are destitute of wealth. Lehman, 

 also, in his Primulea?, and Hooker, in his Mosses, have 

 followed the laudable practise of giving their figures in 

 sketches merely, excellently shaded, by which means the 

 price is very much lessened. As, on the other hand, copper- 

 plates are given frequently of well known plants, but in a 

 style of excessive splendour, and at an expence which cannot 

 be afforded by a private person, we are forced to lament that 

 the science is rather retarded than promoted by this means. 

 Among these expensive copperplates we reckon Sibthorp's 

 Flora Graca, Count Hoffmanseg's Flo7'a of Portugal^ and 

 the Jardin de la Malmaison. 



We cannot advise the giving of figures of plants from 

 stone, because we have not yet been able, in this way, to ex- 

 press the finer parts. The same objection may be made to 

 impressions of plants in printing ink, of which KniphofF has 

 published a great many. 



X. General Works. 

 264. 



General works on the vegetable world contain either an 

 enumeration of genera or of species. The former, which are 

 called Genera plantarum^ should exhibit the known genera, 

 and explain their characters, either according to an artificial 

 system, or according to the natural method. This has been 

 done in a masterly manner by Tournefort in his Institutiones 

 ret JierbariiE, by Linnaeus, Schreber, and Jussieu. 



A complete enumeration of known species of plants, which 

 we call Species plantar um, has hitherto only been offered by 

 Linnaeus, Richard, and Willdenow. An excellent account 

 .of Species^ by Vahl, in his Efiume ratio, was stopped in its 



