ACCOUNT OF GENUS SEDUM AS FOUND IN CULTIVATION. 17 



instances. The following notes are arranged in descending order of 

 hardiness. 



R S. tnoranense — Hardy throughout greater part of British Isles. 



Less hardy than the last. Injured, but not 

 killed in the open in DubUn in bad winters. 

 5. Palmeri has been grown in the open 

 for many years at Great Warley, Essex. 

 At Wisley, in the severe winter of 191 6-1 7, 

 S. retusum, S. Palmeri, and S. compressum 

 withstood in the open a temperature of 

 —2° F. (34° of frost) on grass twice, and 

 \ —4° F. once. 



R S. conjusum 



S. retusum 

 R S. compressum 

 R S. Palmeri 

 R S. praealtum 



Barely survive a 

 in the open. 



mild winter at Dublin 



Uninjured in a cold frame in Dublin, where 

 frost sometimes penetrated shghtly. 



R 5. Bourgaei 



S. cupressoides 

 R S. diversifoUum 

 R S. griseum 

 R 5. mexicanum 



S. oaxacanum 



S. alamosanum 

 R S. amecamecanum 



S. compadum 



S. frutescens 



S. melUtulum 



S. rhodocarpum 



S. allantoides 



S. humifusum 



S. Liehmannianum 



S. longipes 



S. nutans 



S. pachyphyllum 



S. potosinum 



S. Treleasei 



S. versadense 



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 slight 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 pecuUar S. Chaneti and some annual plants. 



The other Sedums found in cultivation which are not hardy 

 come from various parts of the world : S. nudum from Madeira, 



VOL. XLVI. ^ 



Very sensitive to frost. A cold frame 

 was often not sufficient protection in 

 Dubhn, even when covered when frost 

 was expected. 



