352 HISTORY OF THE ROYAL BOTANIC GARDEN. 
— she seed with the same facility as our native heather 
carnea, which has ee samen in the British 
ca 
have frequently seen Figs ass ae lled down o the sure of 
the ground; and I believe it will always suffer in this way, when 
the thermometer falls to (24 OF 25 25 degrees below freezing,' unless 
the ground is covered with snow, or there is some other covering 
self-sown seed, a is the case with most of our native heaths. 
So hi wnleed has already a written on the cultivation of 
nvince 
that much is yet to be learned in the right management of these 
delightful plants. The directions given by our best writers on 
their cultivation are often at variance with each other, and where 
he i 
himself at “s loss to know which of those statements he ought to 
peat e grow them in (Sweet) ; another, that with a very few 
cece sbees, a good sandy loam is the best and that peat soil is not 
necessary for th m, but even proves injurious (Bowi es 
t 
form by fa far the most ee pane ix tribe of tbe tenn for t 8 e greenhouse 
ti aa a assage, 
Hiv ~~ i pe: = eb 
es, Of what other genus can = s am that every pared 
i iful 
1In alluding to the thermometer, as I shall have requent occasion to do, I shall 
always take that of Fahrenheit, which fixes the freezing point at 32 degrees, and 
will therefore mention the number of degrees be ow that point. ‘ 
?A list of all the hardy heaths, both native and foreign, is given in the Appendix. 
