Oxalis, etc., is found. Appears fairly commonly in South and Central 

 Finland. 



Myrtillus type (MT) typical of which are the blueberry 

 and certain Hylocomium, Dicranum and Ptilium species. The pre- 

 dominating forest-type on the moraine-formations of the southern 

 half of Finland. 



H y 1 o c o m i u m-M y r t i 1 1 u s type (HMT), in which 

 blueberry bushes and especially the Hylocomium mosses are more 

 luxuriant than in the former, and the vegetation is also otherwise 

 slightly different from that in the foregoing. This is a North Finnish 

 type, met with most often on wider ridges and heights. 



Heath forests. The surface vegetation is here typical dry land 

 vegetation, such as lichen, Vaccinium vitis idaea, Calluna vulgaris 

 and Empetrum nigrum. These forests, in which the pine is nearly 

 always predominant, are generally divided into the following types. 



Vacc nium type (VT) typical of which is the Vaccinium 

 vitis idaea. It is met with fairly far north also, but is more common 

 on the riclges in the southern half of the land. 



Calluna type (CT) in which Calluna vulgaris is plentiful. 

 Common On the sandy lands in the southern half of the country. 



E m p e t r u m-M yrtillus type (EMT), the most character- 

 istic feature of which are the plants mentioned. Met with only on 

 dry heaths of a fresh nature. 



M y r t i 1 1 u s-C ladina type (MC1T), fairly common on 

 the dryer heaths in North Finland. 



Cladina type (C1T), the surface vegetation of which is 

 almost solely lichen. Commonest on the dry sandy lands of North 

 Finland. 



" The varying productivity of the different types of forest and the 

 difference in value imposed by the same is shown by the following 

 figures taken from yield- tables drawn up for the different forest -types 

 of the- forests in South Finland, which show the amount of growing 

 stock (minus bark) per hectare of eighty-year forests of equal age. 



Oxalis-Majanth. type . 300 cub.metr. 



Oxalis-Myrtillus type . 407 cub.metr. 367 cub.metr. 243 



Myrtillus type ....... 359 320 216 



Vaccinium type ...... 258 



Calluna type ........ 146 



Cladina type ........ 61 



Similarly illustrative figures are obtained if the variations in the 

 number of larger trees on the different areas be examined. Thus, the 

 number of pines filling at least 20 centimetres at a height of 1.3 m 

 in one hectare of 80 year old forest is: 573 in the Oxalis-Myrtillus 

 type, 548 in the Myrtillus type, 378 in the Vaccinium type and 71 

 in the Calluna type. 



