SEMPERVIVCJM SENECIO. 



235 



by a bundle of small white hairs ; in 

 autumn the tops become somewhat 



reddish. Alps. The rock-garden 



and borders, in sandy soil. Divi- 

 sion. 



Sempervivum ruthenicum (Russian 

 Houseleek}. A very profusely-flowering 

 and well-marked kind, lowers, in sum- 

 mer ; rosy- white, large, on stems 6 to 

 J3 in. high. Leaves, in large rosettes, 

 downy underneath, and often very 

 much fringed with silvery hairs, 

 pointed, and turning red at the 



ends in autumn. Caucasus. The 



rock- garden and the margins of bor- 

 ders, in sandy loam. Division. 



Sempervivum tectorum (Common 

 Ho useleek). A well-known plant, grown 

 for ages on housetops, old walls, etc. 

 flowers, in summer; pink, on stems 

 1 ft. high; petals 5 to 9, linear, 

 pointed, entire, downy on the outside, 

 ciliated on the edges. I/eaves, thick 

 and fleshy, oblong or obovate, taper- 

 pointed, ciliated; the upper ones 

 more or less clothed with short viscid 

 down. It varies somewhat, a glau- 

 cous form with broad rosettes called 

 rusticum being one of the most dis- 

 tinct. Britain and various parts of 



Europe. Borders and the rougher 



parts of the rock-garden, in any soil. 

 Division. 



Sempervivum tomentosum (Woolly 

 ffouseleek). Resembles S. arachnoi- 

 deum, but has much smaller rosettes. 

 Flowers, in summer; bright rose- 

 colour. Leaves, in diminutive rosettes, 

 like those of S. arachnoideum, furnished 

 with numerous white cob web -like 

 hairs, which are fewer in the autumn 

 and when the plant is grown in the 

 shade. European Alps. The rock- 

 garden, in well-drained sandy loam 

 and in sunny spots. Division. 



Sempervivum Wulfeni ( Wulfen's 

 Houseleek). Forms compact rosettes 

 of medium size. Flowers, in summer ; 

 sulphur-yellow; on stems 6 to 8 in. 



high. Leaves, glaucous, oblong, long- 

 pointed, fringed only at the base ; the 

 part not fringed is bordered some- 

 times in autumn with a reddish line. 



Tyrolese Alps. Borders and the 



rock-garden, in ordinary sandy soil. 

 Division. 



Senecio adonidifolius (Adonis-leaved 

 S.} A neat little perennial, 4 to 6 in. 

 high. Flowers, in summer; small, 

 deep yellow, in Small terminal clusters. 

 Leaves, much and deeply cut ; seg- 

 ments almost thread - like ; stem 

 simple. Central Europe. Rock- 

 work, or front margin of mixed bor- 

 ders, in sandy soil. Division. 



Senecio argenteus (Silvery Groundsel). 

 Like a miniature of Centaurea 

 ragusina, about 2 in. high. Flowers, 

 in summer ; yellow. Leaves, of 

 silvery whiteness, from to 14 in. 

 long, cut into rounded lobes, growing 

 in dense, compact rosettes, 4 to 6 in. 

 across; stem woody, branching and 

 rooting. Pyrenees. The rock- 

 garden, margins of the mixed border, 

 and as a very dwarf silvery edging- 

 plant, in sandy loam. Division. 



Senecio campestris (Woolly Ground- 

 sel). A pretty British Composite, 6 to 

 8 in. high. Flowers, in summer; yellow, 

 1 to 6 in a simple corymb. Leaves, 

 woolly ; those of the root oblong, 

 nearly entire, narrowed below; stem- 

 leaves lanceolate. In very wet seasons 

 and near the sea this plant is often 

 thrice as large, with many larger 

 heads, and dentate lower leaves, when 

 it is the S. "maritima of some authors. 

 Chalk downs, and on maritime rocks 



near Holyhead. Borders, and the 



rock-garden, especially where an in- 

 terest is taken in native plants ; in 

 light or calcareous soil. Seed or divi- 

 sion. 



Senecio incanns (Hoary Groundsel). 

 A small silvery species, but not so valu- 

 able or so easily grown as 8. argenteus ; 

 3 to 5 in. high. Flowers, in summery 



