XX A FLOBA OF GIBRALTAR AND THE NEIGHBOURHOOD 



include all the species without allowing some elasticity. The 

 majorit}^ of our species, as will be seen, reappear in North Africa, 

 that is, cither in Morocco or Algeria, altliough, in so far as Europe 

 is concerned, many may be restricted to the Cadiz province, to 

 our own region, or even to the Eock. Many others, although 

 included in a defined zone, may also occur in some more or less 

 isolated and often distant country, such as Egypt, Asia Minor, or 

 even Siberia, so that they cannot strictly be regarded as peculiar 

 to that zone, though they seem better placed to it than to any 

 other. It would occupy too much space to detail all these out- 

 liers of the larger zones, so I have only detailed those of the 

 smaller ones. 



In general, I have only considered the distribution in Europe 

 and North Africa, so that many of the species in zones 8, 10, and 

 11, may occur in Asia or even America, while many of those in 

 zones 7 to 11 range as far as the Canaries. It will be seen that 

 about 85 per cent, of our species reappear in North Africa, i. e. 

 either in Morocco or Algeria. 



Varieties of which the types do not occur within our limits 

 are reckoned as species, otherwise they are not included except in 

 the first four zones, nor are naturalized species nor doubtful 

 records included. The percentages are calculated upon the number 

 included in this enumeration, which slightly differs from the 

 total known for the region, a few being omitted as fitting no 

 particular zone, while several varieties ai'e included. 



Zone 1. Eock and North Front. — The species and varieties 

 peculiar to the Eock are eight, or 0'6 per cent, of the total, viz. 

 Clematis cirrliosa v. Dautezi, Iberis gibraltarica (also N. Africa), 

 Brassica sahularia v. iminllaris, Saxifraga fjlohulifera v. 

 gibraltarica (also N. Africa), Helichrysiim rupestre v. Boissieri, 

 Senecio minntus v. gibraltaricus, Tliymus diffusus, Salvia triloba 

 v. calpeana. 



Cerastium Boissieri v. gibraltaricum is excluded, being found 

 also in the Granada province. 



Zone 2. The Limits of this Flora. — The following 

 forty-two, or 3-0 per cent, of the total, are confined in Europe 

 to our limits, viz. Banunculus JiabeUatus v. acinacilobus, v. 

 gregarius, and v. confertus, Anemone coronaria v. micrantha, 

 Fumaria sejnuni, Tuberaria variabilis v. brevipes, Besecla 

 propinqua (also N. Africa), Silene viogadorensis (N. Africa), Gen- 

 ista Winkleri, Ononis Cossoniana v. rotund if olia, 0. crotalariodes 

 V. rubricaulis, Trifolium Juliani (N. Africa), Tetragonohbiis 

 Ijseudopurpureus, Vicia vestita v. tubercidata, Umbilicus pendu- 

 linus V. truncatus, Buplcuruni foliosum (N. Africa), QiJnanthc 

 globulosa v. Kunzei, Lonicera iviplexa v. puberula, Pycno- 

 comon rutcefolium v. bceticum, Bellis rotundifolia v. Jiis- 

 pamca, Senecio Lopezii v. minor, Carduus myriacanthus (N. 

 Africa), Leontodon hispanicus v. psilocalyx, Jasione rosutaris, 

 Erythrcea acutiflora, Scrophularia laxijlora, Betonica algeriensis 

 (N. Africa), Anagallis p)laiyp^W^la (N. Africa), Bumex bucephalo- 

 phorus V. pcrcnnans, Mcrcurialis Beverclioni, Eupliorbia gibral- 



