218 
NEW HOLLAND PLANTS. 
The erection in which these plants are to be grown should, if 
possible, be devoted to them alone, on no account admitting any 
tribe but of the same indurated hard-wooded character among 
them. Heaths are commonly grown along with New Holland 
plants, but the latter like to be kept a 'little warmer, or at least 
to avoid the chilling breeze which appears to invigorate their 
hardier fellows, and would therefore be better alone; the dif¬ 
ference required, it is true, is not much, but on trifles depend 
many great results, and though, by a careful arrangement, each 
may be suited, and the whole kept together, we repeat, they 
would be more easily and certainly managed were the two classes 
separated. Soft-wooded plants must not be tolerated among 
them at all, where high culture is designed with either, except as 
an occasional ornament when in bloom, as the amount of evapora¬ 
tion proceeding from them would be highly injurious to the more 
feeble organs of assimilation of their neighbours, while the neces¬ 
sary admission of air to dry these vapours would prove more 
than the latter could bear, and thus both would suffer. The best 
form for a house intended for these plants is a parallelogram, with 
a low span roof, standing so that the ends may face to the north 
and south ; the main body of light, entering by the sides from the 
east and west, is more equably distributed among the plants, they 
are protected to a great extent from the overpowering influence 
of a mid-day summer’s sun, and by the admission of air the 
temperature of the house can be kept down in summer far more 
efficiently than when, with a southern exposure, the powerful sun- 
rays dart directly through the glass upon the plants; besides 
which, the difference between the summer and winter seasons is 
in a peculiar degree lessened by this arrangement, for though 
there is less heat and light in summer, there is more of the latter 
and less positive cold in the winter, in consequence of the smaller 
surface exposed to the direct northern blasts, and the larger 
space offered to the morning sun. It is essential, where" the 
culture of these plants is desired to be carried as far as excellence, 
that due attention be given to the form and capabilities of the 
erection in which they are to be grown, as experience shows they 
thrive considerably better when retained in the greenhouse always, 
than they do if turned out of doors in the summer, as is the 
usual practice with plants of the class. But to do this, we must 
