REGIONAL VARIATION OF ALNUS GLUTINOSA 



27 



Fig. 1. Location of populations shown in Tables 1 and 2. 



Table 1 



Alder leaf measurements 



Population 



1. Matlcy Bog, Hants. 



2. Chippenham Fen, Cambs. 



3. Santon Downham, Norfolk 



4. Ranworth Broad, Norfolk 



5. Conway Valley, N. Wales 



6. Portmadoc, N. Wales 



7. Chester 



9. North Arran 



11. Glen Nevis 



12. Ballater, Deeside 



13. Kinord, Deeside 



15. Garmouth, Spey Bay 



16. Sutherland i 



17. Sutherland ii 



18. Sutherland iii 



Mean Mean No. of trees 



Length (mm.) Regional mean Breadth (mm.) measured 



61 



54-8 ± 



71-7 ± 13-5 

 65-2 ± 



8-2 



63-3 

 59-8 



57- 2 ± 

 68-9 ± 



58- 6 ± 



59- 8 ± 

 47-4 ± 

 45-4 ± 



60- 2 ± 



52-1 ± 

 49-8 -t 



6- 7 



8- 5 



7- 9 



6- 5 



7- 1 



9- 8 

 60 



5- 5 



6- 3 



6- 5 



7- 4 



(54-8) 



66-7 



61-9 



(58-6) 



53- 



52-3 



55 0 ± 6-1 



53- 8 



59-3 

 59-0 

 57-1 



54- 1 



54- 1 

 56-9 



52-7 ± 



55- 5 ± 

 40-6 ± 

 46-0 ± 

 52-5 ± 



52-0 ± 

 45-3 ± 

 48-0 ± 



± 6-9 



± 11-7 

 ± 11-5 

 ± 7-2 



9-9 

 8-0 



± 8-3 

 7-4 



8-0 

 50 

 8-6 



6- 3 



7- 2 

 5-5 

 51 



10 



10 

 5 

 10 



10 

 10 

 10 



20 



10 

 5 

 5 



10 



10 

 10 

 10 



