THE HOUSE-LEEK FAMILY. 2/5 



E. davifolia. The result of a cross effected by pollen of E. rosea 

 (Courantia Echcveroides, Lem.) on E. bracteosa (Pachyphytum bracteosum) 

 as the seed-parent. 



E. erecta. A hybrid between E. coccinea and E. atropurpurea. 



E. ferrea. A hybrid obtained from E. Scheeri by fertilising it with 

 pollen of E. calophana. 



E. grandisepala. Obtained from E, (gibbiflora) metallica fertilised with 

 pollen from E. rosea. 



E. imbricata. This is a hybrid obtained from seed of E. glatica fertilised 

 with pollen of E. metallica. 



E. mutabilis. A hybrid from E. Scheeri fertilised with pollen of E. 

 linguczfolia. 



E. avata. Obtained from E. Scheeri, the male parent being E. (gibbi- 

 flora} metallica. 



E. pachyphytoides. A stately hybrid between E. bracteosa {Pachyphy- 

 tum bracteosuni) and E. (gibbiflora} metallica. 



M. Deleuil sent out the following hybrid Echeverias in 1876: 



E. colossea. The issue of E. Van Celsii, impregnated by E. atropiir- 

 purea, with leaves exceeding a foot in length. 



E. cochlearis. A hybrid between E. lingu&folia, female, and E. atro- 

 purpurea, male parent. 



E. mirabilis. Between E. bracteosa (Pachyphytum bracteosuni) and E. 

 Scheeri, having superb opaline leaves tinged with rose. 



E. retusa autumnalis. Obtained from E. glauca, fertilised by E. retusa, 

 an abundant bloomer in the autumn. 



E. securifera. Between E. secunda and E. macrophylla. 



E. spiralis. Between E. decipiens and E. californica. 



E. stellata. The result of a cross between E. glauca and E. navicularis. 



Sempervivum (House-leeks], A large group of succulent 

 plants, represented by the common native House-leek, S. tec- 

 torum, and many other species in cultivation. They are readily 

 increased from seeds sown on a pan of fine sandy soil, and 

 covered with a pane of glass painted green, after which the pan 

 may be placed on a shelf in a dryish temperature of about 65 

 or 70. Seeds of succulent plants do not succeed well if placed 

 in a close and humid case, owing to their extreme liability to 

 damp off. Many of the species, as S. canariense, S. tabu- 

 lare, S. tabulceforme, and others, may be propagated like 

 Pachyphytums i.e., by stripping off the lower well-developed 

 leaves and inserting them in well-drained cutting-pans surfaced 

 with sand, after which water them well, and set the pan on an 

 airy shelf in the full sunshine. Some species produce offsets 

 very freely, and these are readily propagated like cuttings. 

 Possibly some of the choice and tender species might be suc- 

 cessfully grafted on S. arboreum or other tall-growing species 

 as a stock. This genus well deserves the attention of the hy- 

 bridist, since even in the native habitats of some European 



