Roads 



( 279 ) 



Robinia 



Principal Species : 



humilis, 2', Je., wh., 

 is probably a vai. 



Other Species : 

 aiirantiiica, '2', sum., wh., 



berries or. 



berries sc. ; brasiliensis 



]>ubescens, 6', spr., pk. 

 la-vis, flowers wh. 

 tiuctoria, 4', spr., wh. 

 ROADS. 



As these have, in many cases, to carry heavy 

 carts as well as withstand a considerable amount 



ROBINIA. (LOCUST TBEE.) 



A small genus of hardy, deciduous, ornamental 

 shrubs and trees (ord. Leguminosfe) of considerable 

 value for the shrubbery or grounds, also for street 

 planting. They are very pleasing with their pin- 

 nate leaves and bunches of Pea shaped flowers. 

 Propagation, by root cuttings or layers. The choicer 

 varieties are grafted on the typical Pseudacacia. 

 Seeds may be sown in spring. Ordinary soil, if 

 moderately dry. 



I'ltotu : Cu**> il 



ROCHEA COCCINEA (see p. 280). 



of pedestrian traffic, it is essential that they be 

 properly formed. A badly made road soon becomes 

 a'n eyesore and a nuisance, and is very expensive to 

 keep in repair. The direction of the road having 

 been decided upon, and pegs put in place to 

 indicate the height, the soil should be re- 

 moved, the top being used where it is required 

 and the subsoil employed for levelling uneven 

 places. The bottom must be rammed hard, and 

 have a slight fall to each side to carry water to the 

 sides, where loose earthenware pipes are laid for. its 

 reception. To these pipes gullies surmounted by traps 

 will conduct the surface water. The gullies should 

 be placed at intervals of from 20' to 30'. For the 

 foundation of a road to carry heavy vehicles (5" of 

 burnt clay is excellent and over this from <>" to 9" 

 of broken granite, the whole being cased with l"of 

 fine gravel, which is watered in with the rolling. 

 During showery weather the road should be heavily 

 rolled as often as is convenient. A road made thus 

 should last for years without need for extensive 

 repairs. 



Principal Species and 



hispida, 3' to 8', My., ro., 

 very ornamental (.<//*. 

 montana and rosea). 



inermis, Ivs. large, 

 branches without 



prickles, superior to 

 above (syns. complexa, 

 hispida rosea, and 

 macrophylla). 



neo-mexicana, 30', aut., 

 ro. 



Pscudacacia, 30' .to 60', 

 Ap. , wh. Common 

 Locust, False Acacia, 

 Bastard Acacia. 



angustifolia, Ivs. nar- 

 row. 



aurea, lys. yel. 



bessoniaua, round- 

 headed. 



Varieties : 



- bcssom'ana latifolia, 

 Ivs. broad. 



crispa, leaflets curled. 



robusta Vignei, a flue 

 ~var. (see p. 278). 



decaisneana, flowers pk. 



fastigiata, pyramidal 

 habit (*//*. pyramidalis 

 and stricta). 



iDermis, round-headed 

 bush. 



inermis albo-variegata, 

 Ivs. variegated. 



. mimostefolia, Ivs. 

 finely divided. 



pendula, drooping. 



semperflorens, flowers 

 throughout sum. 



tortuosa, branches 

 twisted. 



Itaan Tree (see Pi/rnn .\iiciiparia). 

 Roberyia (.see Jtourea). 



