294 ME. J. ball's SPICILEGITJM FLOE^ MAEOCCAN-aS. 



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The following is a tabular view of the Marocco flora, showing : 

 1. The whole number of species belonging toeacb Natural Order 

 found in Marocco ; 2. The number of these which are cosmo- 

 politan or extend in the Old "World beyond the Mediterranean 

 region ; 3. Species of the Mediterranean region including Macaro- 

 nesia ; 4. Mediterranean excluding Macaronesia ; 5. Confined to 

 Western Mediterranean region excluding Macaronesia; 6. Species 



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future Plora of Maroccothe same relation that Desfontaine's ' Flora 

 Atlantica' will hold to the, I trust, not distant Flora of Algeria. | 



I may at once say that I have no claim whatever to approach 

 M. Cosson's extensive and accurate knowledge of the flora of 

 North Africa and South-western Europe, and I feel that it would 

 be a high honour to be associated with him in such a work as that 

 suggested ; but seeing that circumstances have placed me in posses- 

 sion of a considerable mass of materials that must go towards its 

 production, I have thought it better without further delay to pre- | 



sent it to this Society under the title '* Spicilegium Florae Maroc- 

 canse," accompanied by lithographed plates illustrating some of 

 the new species described, presented to the Society jointly by Dr. 



Hooker and myself. 



I trust that M. Cosson will carry out his intention of speedily 

 publishing in a compendious form the rich materials for the Flora 

 of Marocco, most of which are in his exclusive possession, and thus 

 preparing the way for a more complete work. 



In the following descriptive catalogue I have, as a rule, avoided 

 referring to plants not yet published by M. Cosson, excepting 

 where this was necessary to name or illustrate specimens collected 

 by us or other recent travellers, although, through his liberality, 

 I am in possession of many species not enumerated in the follow- 

 ing pages. 



Although I feel that the time has not yet come for attempting 

 a general survey of the Marocco flora, and the materials for dis- 

 cussing the subject must remain further incomplete until the 

 publication of the long expected Flora of Algeria, it would be in- 

 expedient to close these introductory remarks without a brief view 

 of the geographical relations of the Marocco species to those of the 

 surrounding regions. For this purpose I have enumerated in 

 tabular form the Natural Orders indigenous to Marocco under 

 headings that show the distribution of the species hereafter enu- 

 merated. 



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