21 ME. BUNBUEY ON THE BOTANY OE TENEEIFFE. 



naturalize themselves in Madeira (of which I have already given 

 some instances), we may fairly suppose that the plants included 

 in this category are not strictly indigenous, but have been in- 

 troduced since the island has been brought, through human 

 agency, into communication with America and with the southern 

 hemisphere. 



Some of the Madeira plants might almost equally well be classed 

 under this division or the first ; for, though frequent in southern 

 Europe, they are so universal throughout the warm temperate 

 and tropical zones, that they are as likely to have been originally 

 introduced into Europe, as from it. Such are Gynodon Dactylon, 

 Senebiera didyma, Oxalis comiculata, and Gnaphaliwn luteo-album. 



The botany of Teneriffe has been so fully and so well illus- 

 trated, first by Yon Buch and since by Webb and Berthelot, that 

 it would be superfluous to attempt any general review of it ; I 

 will accordingly content myself with offering a few detached ob- 

 servations 



It has been remarked*, that the neighbourhood of Santa Cruz 

 in Teneriffe is one of the most barren localities of the whole 

 Canary group. It is so in appearance, and perhaps actually is so 

 in an agricultural view. To a botanist, however, Santa Cruz is 

 very far from being a barren or uninteresting station. Even the 

 appearance of the coast, as seen from the water at the season of 

 my visit, was far less barren than I had expected from descrip- 

 tions to find it. The coast mountains, though excessively rugged, 

 abrupt and wild, are (at least in the early spring) far from being 

 destitute of verdure ; and beautifully green and fertile spots are 

 discerned in the deep narrow valleys between them. A very sin- 

 gular appearance is given to the littoral mountains by the round 

 pale green bushes or clumps of Euphorbia Canariensis, which are 

 dotted over them in such a way as to produce a curiously spotty 

 effect, that strikes the eye at a considerable distance. 



The immediate neighbourhood of Santa Cruz is much more pro- 

 ductive in a botanical view than that of Eunchal. In the very 

 outskirts of the town, as for instance around the Lazaretto, one 

 finds some of the endemic Canarian species, such as Aizoon Cana- 

 riense, Notoceras Canariensis, mingled with a great number of 

 South-European plants, such as Lamarchia awrea, JPolycarpon te- 

 traphyllvm, Picridivm Tingitanum, Erodivm malacoides, Medicago 



* London Journal of Botany, vol. vi. p. 137. 



