312 



MV GARDEN. 



beds. S. arachnoideum (fig. 664) is particularly interesting from its 

 having a web over its leaves ; it grows freely, and stands the coldest 

 winters, although it is reputed to be tender. I found on the St. 

 Gothard Pass a species covered with a web similar to this species, 

 but none of the plants which I brought over lived. I grow also 5. 

 anomalum, S. arenarium, S. globiferum, S. hirtum, S. Pittoni, S. 

 soboliferum, S. Wulfenii, and many other species. 



Fig. 663. — S. californicum. 



Fig 662. — Sempervivum montanum. 



Fig. 664. — S. arachnoideum. 



i". spinosum (fig. 665) is a very distinct, rare, and beautiful species. 

 I procured my' "specimens from Ware of Tottenham, a great cultivator 

 of alpine plants, but I do not yet know whether it is hardy. 



Amongst kinds which require protection in winter may be mentioned 

 S. tabulcBforme (fig. 666), a most remarkable plant, which has a flat, 

 table-like aggregation of leaves. When it flowers, a stem about nine 

 inches long is thrown up, and the flat table is destroyed. Other delicate 



Fig. 665. — S. spinosum. 



Fig. 666. — S. cabulseforme. 



Fic. 667.— S. BoUii. 



species are ^. arboreum, S. cihare, and 5. repens. S. Bollii (fig. 667) 

 is remarkably fine, and is one of the most beautiful of all the species. 

 The whole plant assumes the form of a cup, and every leaf is 



