229 
It would seem to be a hopeless task to attempt to single out the 
Sempervivums by name—their nomenclature is confused and there 
are so many of them. According to Correvon, Dr. Jordan of 
Lyon claimed to have growing in his garden 6,000 different forms 
of Sempervivum! They are indispensable in the rock garden, 
but their value is largely in their foliage, displayed in rosettes of 
varying form. The Spiderweb Houseleek (S. arachnoideum, 
Fic. 24. Edelweiss (Leontopodium alpinum). (2607) 
Fig. 25), is however, attractice when in bloom, with its starry, 
red flowers on slender stems. Other distinct kinds are: calcareum, 
Fauconetti, blandum (rubicundum of catalogs), and soboliferum. 
Much the same kind of remarks apply to Sedum except that, 
thanks to Praeger’s monograph,! there is a possibility of christen- 
1 An account of the Genus Sedum as found in Cultivation. Journal of 
the Royal Horticultural Society, Vol. 46. 
