Wahlenbergia 



Walks 



Other Species and Variety: 



hirsuta, 1J', Ap., grh., - brevifolia, 1', Ap., 

 red in bud, yel. when grh., crim., yel. (xyii. 

 expanded, drooping. brevifolia). 



WAHLENBERGIA. 



This is a large genus (ord. Campanulacese) of 

 greenhouse and hardy annual and perennial herbs, 

 some of which have woody stems. Comparatively 

 few of them are grown, although upwards of a 

 dozen species are to be found in catalogues. Cul- 

 ture as for the hardy Campanulas, which see. 



Principal Species : 

 hederacea,Jy.,Aug., hdy. 



per., fine, creeping, pale 



bl. stems (st/n. Cam- 

 panula hederacea). 

 Kitaibelii, ti", sum., hdy. 



per., bl., flushed pur, 



tufted habit, 

 saxicola, 2" to 8", Je., 



grh. or hlf-hdy. per., 



pale HI. (si/us, albo- 



marginata aud Cam- 



panula saxicola). New 

 Zealand Bluebell. 



tenuifolia, 3" to 6", Je., 

 Jy., hdy. per., vio., 

 bl., wh., habit tufted 

 (syn. Edraianthus teu- 

 uifolius). 



tuberosa, 6" to 24", sum., 

 grh. per., wh., banded 

 externally ro., habit 

 branching, roots tuber- 

 ous. 



Other Species : 



albo-marginata (see saxi- 

 cola). 



capensis, 1' to H', hlf- 

 hdy. anil., dark bl., 

 grn. (XI/H. Campanula 

 capeusia and Koella 

 decurreus). 



capillacea, 1' to !', My., 

 grh. per. , bl. 



dalmatica, sum. , hdy. 

 per., vio., bl. 



gracilis, 6" to 24", Ap., 

 grh. ami., bl., pur., or 

 wh. (suns. Campanula 

 capillaris aud gracilis). 

 Austrian Harebell. 



graminifolia, 3", sum., 

 hdy. per., pur., in 

 terminal clusters, Ivs. 

 Grass-like. 



Pumilio, My., Jy., hdy. 

 per. , bl. or lil. bl. 



serpyllifolia. (By links 

 Kewensis the correct 

 name is Campanula 

 serpyllifolia, but the 

 Kew Hand-List keeps 

 up Wahlenbergia ser- 

 pyllifolia.) 



undulata, 0" to 12", sum., 

 hlf-hdy. ann., vio., bl. 



uivea (see odontolepis). 

 odontolepis, l\', sum., 



wh., pk., or pale yel. 



(sy>i,t. nivea and Moma 



uivea). 



steetziaua, 10", sum., wh. 



to pale yel. (syn. tenel- 



la). 

 tenella (see steetziana). 



WAITZIA. 



Greenhouse annuals (ord. Composite). Several 

 pretty plants are included, but they are little 

 known to cultivators. Propagation, by seeds sown 

 in heat, the subsequent treatment being as for 

 half-hardy annuals. Soil, loam two parts, leaf 

 mould one part, dried cow manure one part, and 

 sand. 



Principal Species : 



aurea, 1' to 2', sum., 



bracts yel. (//. Morna 

 nitida) . 



grandiflora, 1' to 2', sum., 

 resembles aurea, but 

 heads larger. 



Other Species : 



acuminata (see corym- 



bosa). 

 corymbosa, 1' to 2', sum., 



dark yel., flushed pk., 



sometimes with wh. 



areas (KI/II. acuminata). 



WALDSTEINIA. 



A small genus of hardy perennial herbs (ord. 

 Rosaceic), of creeping habit, much like that of the 

 Fragarias. They are all pretty plants, easy to 



Wafer Ash (Pteka trifoliata). 

 Wailcsia (see Dipodium). 



grow, and thrive in almost any soil. Propagation, 

 by divisions in spring, and by seeds, which germin- 

 ate freely if not sown deeply. 



Principal Species : 

 fragarioides, Je. , hdy., 

 yel. (ngiis. Comaropsis 

 fragarioidee and Dali- 



geoides, Je., hdy., yel. 

 trifolia, 4" to 0" Ap., 

 My., hdy., } vl. 



barda fragarioides). 



WALKS. 



It is highly important that walks should be well 

 made and properly proportioned to their surround- 

 ings. Hints as to their general trend and the 

 purposes which they serve have already been given 

 under LANDSCAPE GARDENING and PATHS. It may 

 be noted here, however, that whatever substance 

 the surface of the walks may be made of, it should 

 be possible to walk upon it in all but the worst of 

 weathers, and, in order to secure this, the walk 

 must be thoroughly made in the first instance. 

 In some localities, where the subsoil is a very 

 pervious gravel, little is done besides roughly 

 levelling the ground and putting on a coat of 

 gravel or ashes. This method, however, is not to 

 be recommended. 



The amount of work needed in the construction 

 of a good walk will depend almost entirely upon 

 the traffic that the path is expected to carry, 

 considered with the lie of the ground, and the 

 character of the soil and subsoil. Thus patlis and 

 roads that are meant to bear heavy vehicular traffic 

 have to be excavated to a considerable depth, and 

 plenty of rough stuff worked in to serve as founda- 

 tion (tec ROADS). The gravel paths of the kitchen 

 garden, which have to carry rather lighter traffic, 

 should be dug out to the depth of at least 6", 4" of 

 rough foundation being used, and about 2" of finer 

 gravel, the top 1" being the finest. Heavy and 

 repeated rollings are in every case requisite. In 

 making all gravel paths and roads it is important 

 that the edges should first be determined, and the 

 nearer these two edges are on the same level the 

 easier the work will be. It is not difficult to 

 obtain the levels. Borning rods, a 10' to 12' straight- 

 edge, and a spirit level are the tools required. 



Once the edges are cut, the levels obtained, and 

 the foundation placed in position, a row of pegs 

 should be driven down the centre to serve as a 

 guide for laying on the top fine gravel. It is quite 

 easy to remove these pegs as the work of finishing 

 off proceeds. 



The draining of walks is an important item. 

 The usual plan is to lay 3" pipes under the rough 

 ballast at each side of the walk, taking these drains 

 to the nearest outlet. Take-away pipes, guarded 

 with iron gratings, communicate witli the drain 

 pipes. Frequently each take-away is provided 

 with a trap, to prevent sediment from choking up 

 the drains. These traps should be frequently 

 examined and cleaned out. 



The height of the centre of the walk above the 

 level of the edges will depend upon the width. 

 Thus, in an 8' walk the centre will be about 4" 

 higher than the edges, J" being added for ever3" 

 additional 2' in width. 



The width of walks must in all cases depend 



WaJie Itnliin (see Arum macitlatitm and Trillium 



yrandi forum). 

 Walltera (see Gompliia). 

 Walking Leaf (Soolopendfiwm rJii:opJnjlltuii). 



