ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 17 
instances. The following notes are arranged in descending order of 
hardiness. 
R S. moranense — Hardy throughout greater part of British Isles. 
Less hardy than the last. Injured, but not 
killed in the open in Dublin in bad winters. 
S. Palmeri has been grown in the open 
for many years at Great Warley, Essex. 
^ At Wisley, in the severe winter of 1916-17, 
S. retusum, S. Palmeri, and S. compressiim 
withstood in the open a temperature of 
—2° F. (34° of frost) on grass twice, and 
-4^ 
R S. conjusum 
S. retusum 
R 5. compressum 
R S. Palmeri 
R S. praealtum 
'° F. once. 
R S. Bourgaei \ 
S. cupressoides 
R S. diver si folium 
R S. griseum 
R S. mexicanum 
S. oaxacanum 
S. alamosanum 
R S. amecamecanum 
S. compactum 
S. frutescens 
S. mellitulum 
S. rhodocarpum 
S. allantoides 
S. humifusum 
S. Liehmannianum 
S. longipes 
S. nutans V 
S. pachyphyllum 
S. potosinum 
S. Treleasei 
S. versadense 
Barely survive a mild winter at Dubhn 
in the open. 
Uninjured in a cold frame in DubHn, where 
frost sometimes penetrated sHghtly. 
Very sensitive to frost. A cold frame 
was often not sufficient protection in 
Dubhn, even when covered when frost 
was expected. 
The species marked R have succeeded well in the open in the 
garden of Sir John ■ Ross- of -Bladensburg, at Rostrevor, Co. Down, 
an exceptionally mild spot. 
Hardiness in these cases cannot, so far as the shght evidence 
goes, be gauged by the altitude of the Mexican habitats. Thus, 
the quite tender Liehmannianum, nutans, and pachyphyllum grow in 
their native haunts about as high on the mountains (6,000-7,500 feet) 
as the hardy moranense and retusum (6,000-8,000 feet). 
Of the tender Chinese species, the majority belong to the Japonica 
series, and they vary from hardy in most parts of the British Isles, 
e.g. S. sarmentosum, to distinctly tender, e.g. S. lineare. The rest 
include the peculiar S. Chaneti and some annual plants. 
The other Sedums found in cultivation which are not hardy 
come from various parts of the world : 5. nudum from Madeira, 
VOL. XLVI. c 
