BANKS AND SLOPES IN GARDENS 13 



tinctoria, and also the native Genista pilosa. These 

 are all very small shrubs growing naturally in the 

 driest places. Most of the Cistuses are rather large 

 for planting on banks; but Cistus florentinus, C. 

 lusitanicus, and C. formosus are small enough and 

 may be kept compact by cutting back. Olearia stel- 

 lata (Eurybria gunniana) is the smallest of the Olearias 

 and also may be cut back after flowering with ad- 

 vantage. This and the Cistuses are flowering shrubs 

 of the greatest beauty. There is also a dwarf form 

 of Lavender very suitable for banks, and a prostrate 

 form of the common Rosemary, a most beautiful and 

 valuable shrub. Santolina incana and its smaller 

 variety, incana nana, look their best on banks of the 

 poorest soil, and should be cut down every two years 

 or so in spring. 1 



All the plants and shrubs which we have mentioned 

 will endure any amount of drought when established, 



1 Of the several species of Cytisus mentioned here C. Schipkaensis may 

 be found in Bailey's new Cyclopedia under Cytisus No. 2, C. leucanthus 

 Schipkaensis. Cytisus florentinus is possibly a mistake for Genista florida, 

 see under Genista No. 12; there is no Cytisus florentinus known in botan- 

 ical literature. C. lusitanicus is apparently Genista lusitanica, see Genista, 

 suppl. list. C. formosus is possibly Genista formosa which is Cytisus 

 racemosus, see No. 16. C. pilosa is Genista pilosa, see No. 15. Only one 

 of these species is offered in American trade catalogues, C. Schipkaensis. 

 This and Genista pilosa are hardy in the latitude of Boston. The others 

 could probably be grown only in California and the South. The same is 

 true of Olearia stellata which is apparently not sold hi the United States. 



The following may be suggested as American substitutes for the shrubs 

 mentioned above: Cotoneasters in their evergreen dwarf forms, Berberis 

 aquifolia, Ceanothus, Daphne, Evonymus radicans, especially var. vegeta, 

 Rhododendron Wilsonianum punctatum, Andromeda, Leucothoe, Hyperi- 

 cum calycimum, Kalmia angustifolia, Lonicera halliana, Rosa wichuriana, 

 and Xanthoriza. L. Y. K. 



