ME. BTTNBURY ON THE BOTANY OF MADEIRA. 21 



Obs. — The number of species of flowering plants peculiar to 

 Madeira is stated* at 85 ; but this number may probably be rather 

 too high ; at least, the distinctness of several of Mr. Lowe's new 

 species appears doubtful. In fact, in all estimates of botanical 

 statistics, we are met at every step by the difficulty of deciding 

 what are distinct species. The differences of opinion among emi- 

 nent botanists on this point, and the want of anything like a fixed 

 rule, throw an uncertainty upon all numerical comparisons of the 

 floras of different countries. 



II. Plants common to Madeira and the Canaries, 



AND CONEINED TO THEM. 



Chdranthus mutabilis. 



Hypericum floribundum. 



H. glandulosum. 



Geranium anemonifolium. 



Rhamnus glandulosus. 



Celastrus cmssinoides. 



Phyllis Nobla, L. 



Clethra arbor ea (found in the Canaries, according to Von Buch) . 



Globularia longifolia, Soland. 



.Lavandula pinnata, L. 



Teucrium heterophyllum. 



Micromeria varia, Benth. 



Cedronella triphylla, Benth. 



Laurus Canariensis, Webb and Berth. 



L. (Phoebe) Barbusano. 



L. ( Oreodaphne) foetens. 



Euphorbia piscatoria. 



Carlowitzia salicifolia, Mcench. 



III. Plants common to Madeira and Azores, not found in 



Canaries. 



Vaccinium padifolium, Sm. (= V. Maderense, DC.) 

 Ilex Perado, Soland. (In the Azores, according to "Watscn, in 

 ' Hook. Lond. Journ.' vol. iii. The Ilex Perado of Yon Buch's 

 list of Canary plants is I. Canariensis, Webb and Berth.) 

 Melanoselinwn decipiens, Hoffm. 



* Hook., Lond. Journ. Bot. vol. vi. p. 126. 



