36 



G. D, FULLER AND A. L. BAKKE 



TABLE 4 



Statistical-biological analysis of the Arbutus unedo formation, Barcelona {50 areas 



of 0.1 sq. m. each). 



Arbutus unedo 



Calycotome spinosa , 



Cistus salviaefolius 



Erica arborea 



Lonicera caprifolium 



Phillyrea media 



Pistacia lentiscus 



Quercus coccifera 



Quercus ilex 



Quercus pubescens , 



Smilax aspera 



Dorycnium suffruticosum 



LIFE-FORM 



N 



N 



N 



N 



N(-Ch) 



N 



N 



N 



M(-N) 



N 



N 



Ch(-H) 



DEGREE OF 



FREQUENCY 



OR VALENCE 



PER CENT 



96 



22 



62 



38 



14 



2 



4 



76 



2 



2 



4 



2 



leaf-size 

 of the ever- 

 green phane- 

 rophytes and 

 chamaephytes 

 with simple 

 (and lobed) 



LEAVES 



mik 



n.-mik. 

 1 



mik. 



n 

 mik. 



mik. 



TABLE 5 



according to height. It is noticed that the similarity is greatest 

 between the heath of West Jutland and the Thyme of northern 

 Spain. We see here that in climates differing largely in a physi- 

 cal sense the same life forms may appear. As far as the heath is 

 concerned, it is leptophyll, its xerophytism as a whole being 



