1017 



means let him perform the same, and make a " perfect " list of natu- 

 ralized plants. 



The continuous numbering of the specific names has been objected 

 to, (Phytol. 933). For an index to herbaria, in which each genus on- 

 ly had a separate cover, the editorial preference for generic numbers 

 would be judicious. In a duplicate store on a large scale, it is found 

 practically more convenient to have a separate cover for each species, 

 with the numbers marked outside, for convenience of ready reference 

 and arrangement ; since botanists apply for species and varieties, not 

 tor genera. 



The London Catalogue, like its predecessors, has faults, both ty- 

 pographical and authorial ; and it has not the novelty which Mr. 

 Sidebotham would seem to give it credit for. A well compiled (but 

 anonymous) Catalogue of British Plants, in the natural arrangement, 

 and with synonymes, was published some six or eight years ago ; 

 which is still in print. G. E. Dennes. 



Art. CCXXV.— Varieties. 



493. Tlie Nomenclature of Ferns in the ' British Flora ' and the 

 ' London Catalogue of British Plants.^ In your present number 

 (Phytol. 497) a passage occurs, which is calculated to eenvey a wrong 

 impression respecting the extent of dissimilarity between the names 

 of ferns in the Flora and Catalogue. The Filices and Pteroides (an 

 abbreviation of Pteridioides — Fern-like) are grouped under twenty- 

 two generic names in the Catalogue, twenty of which are identical 

 with those in the ' British Flora.' Two other generic names are ne- 

 cessarily added to the twenty, in consequence of two genera in the 

 Flora being subdivided into four genera in the Catalogue. Among 

 fifty-seven specific names of the same plants in the Catalogue, forty- 

 eight correspond Avith those of the British Flora. Of the other nine 

 specific names, five belong to additional species (or varieties " raised 

 to the rank of species ") adopted from Mr. Newman and ' The Phyto- 

 logist ; ' four only being changed names — Trichomanes speciosum, 

 Lastraea spinosa, Equisetum Telraateia and E. umbrosum. The first 

 of these four was adopted on the authority of Madeira specimens, 

 collected and labelled by Dr. C. Lemann, which appear connected 

 with both forms of the Irish plant (speciosum and Andrewsii) through 

 other specimens collected in the Azores. The remaining three names 

 were taken up on the faith of Mr. Newman's investigations, first pub- 



4(=i 



