The leayes are deciduous, and approach in size to those of 
Maeno tripetala; some of them on the younger plants 
measure ten inches in length and five in breadth at the widest 
part; but on the flowering branches, the largest are not more 
than eight inches Jong and three and a half broad: they are 
ofa shining green on the upper surface and glaucous under- 
neath, rather obovate than elliptical, a very little acuminate, 
and narrowed towards the base; and are more supple than in 
variety «. ‘The flowers are three times the size of the common 
glauca, of a cream colour, changing as they fade, to a 
rusty yellow. 3: 
The three calycine petal-formed leaflets, which are nar- 
rower, less hollowed, and less fleshy and brittle than the 
petals, are of a greenish white colour, and change to a rusty 
brown ; they do not fall off as the flower opens, as is usually 
the case in glauca, but fall back, giving the flower a resem- 
blance to that of M. tripetala. The corolla consists of 
nine petals in three ranks, each rank diminishing in size. 
It has been a question among cultivators, how far exotic 
trees of warmer regions may be naturalized to our climate by 
propagating them from seeds ripened here. It has even been 
supposed that, by a repetition of this process, the tenderest 
plants may in time become hardy. On the other hand it has 
been asserted, that such plants, when raised from seeds pro- 
duced here, have less vigour, and are less able to bear the 
severity of our climate, than imported plants, or those raised 
from imported: seeds. The present case, as far as one 
experiment can go, favours the first opinion ; but then it is 
_to be remembered that Pensylvania, the native country of 
Maenorta glauca, is subject to much severer cold than Great 
Britain; and the reason that the young shoots of North 
American trees are frequently killed by our frosts appears to 
be, that our summers are not sufficiently warm to harden the 
wood. But if plants raised from seeds ripened here can 
bring their wood to sufficient maturity, in the moderate heat 
of our summers, to resist the winter frosts, which those raised 
from foreign seeds cannot, the advantage gained amounts to 
the same. Mr. Tuomson observes that the young shoots of 
his new variety are never injured by our frosts ; which, with 
the freer growth and greater vigour of the plants, seem to 
shew an acquired habitude of climate. | 
