Part II. SENECIO. 337 



The under-mentioned kinds I first observed in cultivation 



in the Jardin des Plantes, at Paris. They are mostly sorts 

 desirable for cultivation. 



Sempervivum affine 

 albidum 

 barbatulum 

 * Boutignianum 

 ComoUii 



Sempervivum Doellianum 

 Fauconetti 

 fimbriatura 

 * Pseudo-arachnoi- 

 deum 



Sempervivum Schle.- 

 ani 

 * Verloti 

 violaceum 



Umbilicus chrysanthus is frequently associated with the Sem- 

 pervivums in botanic gardens, and much resembles a small 

 Houseleek, but has spikes of goldeti flowers. It is worthy of a 

 place in large collections, and issuitable for rockwork. The small 

 reddish and thick-leaved sedum-like U. sedoides of the Pyrenees 

 is also an interesting kind, and U. spinosus a. remarkable-looking 

 one. I have not seen it. in cultivation in the open air except 

 in the botanic garden at Geneva. Dry sunny parts of the rock- 

 garden will be found most congenial to these plants. 



SENECIO AEG-ENTEUS. — Silvery Groundsel. 



A STURDY but minute silvery plant, almost like a diminutive of 

 the popular Centaurea ragushia. The leaves are quite silvery, 

 and vary from half an inch to one inch and a half long, the footr 

 stalk of the leaf channeled, and the blade cut into rounded lobes. 

 The whole plant is not more than two inches high when fully 

 developed and established ; it stands any weather, and will live 

 everywhere in sandy soil in well-drained borders. It will prove 

 valuable for rockwork or borders, and, being well fitted to form 

 beautiful dwarf edgings, will probably become very popular. The 

 flower is not attractive, but, like the Centaurea and Cineraria 

 maritima, the plant is valuable for the effect of its foliage. A 

 native of the Pyrenees ; increased by division. 



SENECIO tJNIFLORUS. — One-flowered Groundsel. 



A VERY silvery dwarf species, growing little more than an inch 

 high, very suitable for rockwork, but scarcely equal to the pre- 

 ceding, and not so easily grown. The flowers are poor, and 

 should be removed, as tending to weaken and disfigure the 

 plant. Increased by seed and division. A native of Switzerland, 

 and perfectly hardy. S. incanus is another pretty dwarf alpine 



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