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1903J MACCHIE OF NEAPOLITAN COAST REGION 35 



No. of 



Name. Individuals. 



Arbutus Unedo L. - - - - 464 



Erica arborea L. - - - - 12 



Quercus Ilex L. - - - - - 12 



Querctis JEgilops L. - ' - - - 12 



Ciematis Flammula h, - - - 16 



Smz'/ax aspera L - - - - - 200 



Coronilla Emerus L, - - - - 812 



Myrtiis co?nmunis L - - - - 124 



Cistus villosus L. & C salvifoliiis L. - 24 



Pis facia Lentisctis L. - - - - 44 



Rhamiins Alaternus 'L, - - - ' 12 



The shrubs in this locality formed a close and rather high 

 thicket. Its denseness was in places at least twice that of the 

 measured area B. The Arbutus was the predominating species 

 from its large numbers and its size, some of the shrubs being 

 2.4"^ high. The Q. Ilex in places reached the height of 4"^, but 

 in general was somewhat over 2^ high. The Coronilla and the 

 Erica showed themselves to be decidedly shade plants, reaching 

 their greatest dimensions and appearing most vigorous when pro- 

 tected by the shade of taller species, e. g,y the Arbutus. 



The much greater luxuriance of vegetation in B than in A is 

 not mainly due to the lower altitude of B, but rather to the richer 

 soil and better water supply. The soil of A was a thin layer of 

 clayey loam, derived mainly from the weathering of the subjacent 

 ► solid limestone, while that of B was of similar chemical and physi- 



cal character, but deeper, and underlaid by a talus of small frag- 



ments of limestone {Jig. i). 



C. 



Pozzuoli, on exterior slope of Solfatara hill, facing S.E., 

 altitude over 120"" above sea level. 



No. of 



Name, Individuals. 



Myrtiis commimis v.. - - - 800-1200 



Cistus salvifolius L. - - - 190 



Calycotome villosalJiwk. - - - I43 



Erica arborea L. - - - 42 



Spartitim jujtceum L. - - - 33 



Inula viscosa Ait. - - - 27 



Quercus pubescens Willd. - - 13 



Quercus Ilex L. var, - - - lo 



Clematis Flammula L. - - - i 



Arbutus Unedo L. - - - I 



