THE CAKAEIAN FLOEA. 409 



The disproportion between the two Floras in the case of 

 these selected genera is thus well shown. It is most remarkable ; 

 the number of endem.ic species being in the Canaries three- 

 fourths of the whole and in Marocco only one-sixth ; and were 

 the peculiar genera of the Canaries added, the disproportion 

 would of course be increased. 



The total number of Canarian species enumerated by Webb 

 and Berthelot is about 1,000, of which 367,' or more than one- 

 third, are regarded as peculiar to the Archipelago (a very few 

 only of these being also Madeiran); whereas out of 1,627 Ma- 

 roccan species only 165, or a little over one-tenth, are peculiar. 

 Future discoveries will probably not materially increase the 

 Maroccan proportion of peculiar species; whereas since the 

 publication of Webb's ' Phy tographia ' many peculiar species (es- 

 pecially of Statice and CrassulacecB) have been discovered in the 

 Canaries, and but few species common to other countries ; and 

 these additions will go far to neutralise any error introduced into 

 the estimate, due to the great number of new species founded 

 on insufficient data which the ' Phytographia ' iacludes. 



Under this head also should be included the peculiar Cana- 

 rian genera that appear to be modifications of continental ones. 

 They are Bencomia, closely allied to Poterium, of which there 

 are two species, both confined to one Island (Teneriffe); one of 

 these is also a native of Madeira, where only two individual 

 trees, a male and a female, have ever been seen ! Gesnouinia, 

 allied to Parietaria; and Ganarina, a monotjrpic genus allied to 

 Campanula, but having a baccate fruit. Bosea, also a mono- 

 typic plant, is wholly unlike any known genus, and is, in some 

 respects, intermediate between the two very distinct natural 

 families — Ohenopodiaeece and Phytolaccece. 



V. Many Canarian plants are representatives of Floras more 

 distant than those of Marocco or Western Europe, and are not 

 found in those countries. These form an exceedingly interesting 

 group, and may be classed according to countries thus : — 



a. Oriental. — These are chiefly Arabo- Egyptian, but some 

 of them extend even into Western India, and a few are repre- 



' This estimate is subject to the same deductions as I have referred 

 to in note 2, p. 407. On the other hand, were the many obviously intro- 

 duced species to be struck out of Webb and Berthelot's enumeration, 

 the proportion of peculiar species would be considerably augmented. 



