CHAP. XIV. 



CAItYOPHYLLA CE^E. 



359 



App. i. Other Species of Pittdsporum. 



P. revolutum Ait {Bol. Reg., 186., and Bot. Cab., t. 506.), from Port Jackson ; P. tomenthsum 

 Bonp. {Swt. Ft. Aust., L33.), from New Holland; P.fiilvum Rudge ; P. hirtum Willd., from the 

 Canary Islands ; and various other species ; are, in all probability, equally hardy with P. Tobira. P. 

 criocarpum, from the Himalaya, has already been noticed as probably half-hardy, p. 173. 



App. I. Other Pittospordcece probably half-hardy. 



Sendcia. nepaldnsis Dec, a shrub from Nepal, introduced in 1820, and treated as a green-house 

 plant ; and Bursaria spinbsa Cav. figured in Bot. Mag., 1767., a shrub from New Holland, pro- 

 ducing a profusion of elegant little white blossoms; are probably as hardy as the species of Pittos- 

 porum, which have been tried against a conservative wall. Cheiranthera linearis which Dr. Land- 

 ley states {Bot. Reg , t 1719.), to be " one of the most beautiful plants in all the flora of New Holland," 

 would be also, if a plant of it could be obtained, well worthy of a trial. 



CHAP. XIV. 



OF THE HARDY SUFFRTJTICOSE PLANTS OF THE ORDER 

 CARYOPHYLLACEiE. 



This order is introduced chiefly for the sake of the tree carnation, one of the oldest inhabitants of 

 British gardens, and one of Xhe finest plants that can be placed against a conservative wall. There 

 are various species and varieties of Dianthus, which, technically considered, are ligneous plants. 

 Indeed, the common pink and carnation are shrubs, and that, too, evergreen ; because they do not 

 die down to an underground bud, at the end of the growing season, like, for example, Ranunculus 

 acris. 



J~ 1. Dianthus Caryophyllus var. frutiedsus Hort., the shrubby 

 Clove Pink,or Tree Carnation, in its wild state, is a native of the south 

 of France, of the Alps of Switzerland; and, in England, it is found 

 on old ruinous walls near towns, particularly on Rochester Castle, on 

 the old walls of Norwich, and on ruins adjoining several other old 

 English towns. It has been cultivated in gardens from time imme- 

 morial ; and is highly valuable, no less for the brilliancy of its colours, 

 than for the aromatic fragrancy of its flowers. The tree variety is 

 one which has been originated, in 

 all probability, by training the plant 

 against a wall, and thus keeping 

 it continually in a growing state 

 without permitting it to rest, and 

 afterwards continuing this habit by 

 propagating it by layers or cuttings. 

 The flowers of the tree carnation are 

 not so various and beautiful as those 

 of the common dwarf carnation ; but 

 they are still objects of very great 

 beauty, and are universally admired 

 for their symmetry of form, rich 

 colours, and grateful odour. Planted 

 against an east or west wall, in calcareous loam, and carefully 

 trained, a plant will grow at the rate of a foot a year ; and, if pro- 

 tected during very severe winters, it will attain the height of 6 ft. 

 or 8 ft In Scotland, in the neighbourhood of Edinburgh, in Dalroy 

 Nursery, in 1800, a plant against the west end of a green-house 

 covered, in five years, a space 8 ft wide, and 6 ft. high, flowering 

 beautifully every year. 



JU. 2. Other suffruticose evergreen Caryophyllacece. Dianthus ar- 

 buscula Bot. Reg., 1086., D. arbbreus L. {Bot. Cab.,459., and our fig. 84.), 

 D. frutiedsus L., and D. suffrutiedsus W., are all beautiful glaucous- 

 leaved evergreens, which require a little protection during winter, and produce their fragrant pink 

 flowers from June to August. Silene frutiebsa L., Aren&ria verticilldta W., and Drypis spindsa L. 

 {Bot. Mag., 2216., and our fig. 85.), are all beautiful little evergreens, from 1 ft. to 1 j ft. in height. 



