46. 
THE ALDER BUCKTHORN. 
Rhamnus frangula. 
Prate 5, Fra. 13. 
“¢ UDGED by the normal ‘Tree 
standard, the Alder Buckthorn 
will come even less within Tree 
limits than the species last de- 
seribed, for it is rarely found 
higher than ten feet in our wood- 
| Ss ister indeed it is not higher 
# than six feet; but as one of its North 
American relatives attains a height of 
forty feet, we may fairly ascribe the comparative 
diminutiveness of our species to less favourable 
conditions of growth, and not on that account 
refuse to give it Tree honours. 
