189 

 TO COEEESPONDENTS. 



Rock. Plants.— 22. Massie, Wrexham. — The following selection of plants, suit- 

 able for this purpose, comprise the best kinds at present in cultivation. Achillea 

 Clarennce, silvery foliage, yellow flowers, and requires a dry, sunny position. 

 JEthionema saxatilis, pretty pink flowers. Alchemilla alpina. Alyssuyn saxatile 

 compacttim, a fine dwarf variety of the species, with immense heads of golden yellow- 

 flowers ; A. saxatile vanegatum. Andromeda hypnoides, a charming little plant 

 from Norway and Lapland, white, bell-shaped flowers. Androsace carnea, pink 

 or bright rose-coloured flowers, a perfect gem ; A. ciliata, beautiful crimson 

 flowers ; A. lactea, white flowers in the way of A. coronopifolia, but much larger. 

 Antennaria hyperlorea^ silvery foliage. Aquilegia alpina, large, purplish blue 

 flowers. Arabis albida, A. alpina, and A. lucida variegata. Arenaria halearica, 

 a pretty little dwarf-growing plant, with white flowers. Auhrietia deltoidea 

 grandijiora^ bluish lilac ; A. Camphelliy violet blue, fine. Campanula garganicay 

 fine bluish purple flowers. Cerastium JBiebersteini, C. tomentosum, dwarf trailing 

 plants, with silvery foliage and pretty white flowers. Cheiranthus alpimis, bright 

 yellow ; C. Marshalli, orange, dwarf-growing plants. Cistus Algarvensis, yellow; 

 C. ledon, yellow ; C. roseus, rose. Convolvulus Mauritanicus, blue, pretty trailing 

 plant. Crocus sativus, an autumn and ijvinter flowering species, with "pale blue 

 flowers. Cyclamen coum, deep red ; C. coum europoeum, rosy pink ; C. hederi- 

 folium, pink ; C. hederifoUum album, white. Daphne striata, pink. Dianthus 

 alpinus, large, deep rose-coloured flowers. Draba aizoide^, bright yellow. Dryas 

 Drummondii, pale yellow. Erinus alpinus roseus, bright rosy pink. Fragaria 

 alpina fiore plena, F. vescafoliis variegatia. Gentaini acaulis, blue ; G. ciliata, 

 rather a new species from Switzerland, with azure blue flowers ; G. herna, 

 blue. Glechoma hederacea variegata. Iberis saxatilis, Avhite ; I. sempervirens, 

 white ; I. Tenoreana, white. Linaria alpina, violet ; L. cymbalaria variegata. 

 Lychnis viscaria splendens, bright pink. Lotus corniculatus flare plena, yellow. 

 Mimulus cupreus, orange or scarlet; J/. Moschatus (musk). Myosotis Azoricus^ 

 rich purplish blue ; M. montana, deep blue. The Mimulus and Myosotis }nust be 

 grown where they can have plenty of moisture at the roots. Orobus vernus, 

 purple. Oxytropis uralensis, purple flowers and silvery foliage. Fhlox Nelsoni, 

 pure white. Phyteuma hcBmisphcericum, blue ; P. humilef dwarf-growing blue. 

 Polygala chamcebuxus, bx-ight yellow, fragrant. Saponaria cccspitosa, rose. 

 Saussurea alpina, foliage silvery white beneath. Saxifraga affinis, white ; S. 

 aizoides, yellow ; S. biflora, rosy purple ; S. caryophylla, large white flowers, dis- 

 tinct ; S. cotyledon, S. piyramidalis, white, with purple centre ; tS'. cymbalaria, 

 pale yellow, spotted with orange; 8. granulata, white; S. hirculus major, yellow, 

 spotted with orange, very distinct; S. juniperina, yellow, flowering in' dense 

 clusters ; ^S". japonica variegata, S. oppositifolia, purplish rose ; S. oppositifolia 

 alba, white ; S. oppositifolia splendens, bright crimson ; S. pectinata, compact, 

 silvery-edged foliage. Sedum acre aureum, yellow ; S. album, white ; S. anglicum, 

 white and red ; S. cyaneum, yellow ; 8. ptirpureum, rose ; 8. pallidum roseum, 

 rosy pink ; S. Sieboldi, blue. Sempervivuni barbatum, 8. globiferum, and S. 

 montanum. Silene acaulis, rose ; »S. acaulis alba, white. Vinca major, blue ; 

 V. major variegata elegantissima, V. minor, blue ; V. minor alba, white ; V. rosea 

 plena, purple. The Vincas are very valuable for growing in shady places. You 

 can depend upon getting the above-mentioned plants at Messrs. Backhouse and Son 

 York, and Messrs. E. G. iJenderson and Sons, Wellington Eoad, St. John's Wood ' 

 both fira:s have grand collections of these beautiful flowering plants. Taking into 

 consideration the extreme beauty of these plants, and the ease with which they are 

 grown, we are always surprised that they are not sought after more than tliey are ; 

 in point of real beauty many of the plants named in the foregoing list are unrivalled, 

 Aloysia citriodoha. — C. IL—Wti are surprised that you have had so much 

 difficulty in propagating this fragrant plant, for it is one of tlie easiest plants to 

 propagate and grow that we have in cultivation. You must try again, and we will 

 help you with a little advice. Take cuttings at once from the young growths 

 made this spring, and we miyht say treat in the usual manner ; but as you liave 

 been so unsuccessful we will give you full details. Before taking off the cuttings 

 prepare some pots for receiving them, by filling them one-third full of broken 



