L ] 
Sempervivum arachnoideum. Cobweb 
Houseleek. 
Clafs and Order. 
Dodecandria Dodecagynia. 
Generic Character. 
Cal. 12-partitus. Petala 12. Caps . 12. polyfpermae. 
Specific Character. 
SEMPERVIVUM arachnoideum foliis pilis intertextis, pro- 
paginibus globofis. Lin. Syjl. Vegetal . p~ 
45 6 * 
SEDUM montanum tomentofum. Bauh. Pin. 284. 
By the old Botanifts, this plant was confidered as a Sedtm ; 
and to this day it is generally known in the gardens by the 
name of the Cobweb Sedum> though its habit or general appear- 
ance, independent of its fru&ification, loudly proclaims it a 
Houfeleek. 
In this fpecies the tops of the leaves are woolly ; as they 
expand they carry this woplly fubftance with them, which 
being thus extended, afTumes the appearance of a cobweb, 
whence the name of the plant. 
Like moft of the Houfeleeks it is belt kept in a pot, or it 
will grow well and appear to great advantage on a wall or 
piece of rock-work; the more it is expofed to the fun, the 
more colour will enliven its (talks and foliage, and the more 
brilliant will be its flowers; the latter make their appearance 
in J u, y- 
It is propagated by offsets which it fends forth in abundance. 
It is no uncommon praCtice to treat this beautiful fpecies of 
Houfeleek, as a native of a warm climate; under fuch an idea 
we have feen it nurfed up in ftoves, while the plant fpontane- 
oufly braves the cold of the Switzerland Alps. 
