WAH 



C 817 ] 



WAL 



requiring the same treatment as the larger Irias. 



They bloom in April. 



W. brevifo'lia (short-leaved). 1. Purple. 1795. 



Breynia'na (Breynin's). 1. 1825. 



grami'nea (grass- leaved). 1. 



Hibbe'rtii (Hibbert's). 2. 1823. 



hirsu'ta (hairy). l. Violet. 1687. 



panicula'ta (panicled). 2. 1/00. 



tene'ila'( tender). 1. 1816. 



thyrsiflo'ra (thyrse-flowered). 2. May. 1759- 



WAHLENBE'RG-IA. (Named after Dr. 

 Wahlenberg, author of "Flora Lappo- 

 nica." Nat. ord., Bellworts [Campanu- 

 laceae]. Linn., 5-Pentandria 1-Mono- 

 yynia.) 



All are blue-flowered, except when otherwise 

 mentioned. Seeds under a glass in the begin- 

 ning of April, and planted out in the end of May ; 

 division of perennials, and cuttings of the young 

 shoots in the beginning of summer, under a 

 hand-light; sandy peat and loam, and a cool, 

 moist situation. 



GREENHOUSE ANNUALS, &C. 

 W, capiila'ris (hair- leaved). May. N. Holland. 

 1824. Biennial. 



ce'rnua (drooping). Blue, white. July. Cape 



of Good Hope. 3804. Biennial. 



dehi'scens (gaping). White. June. Bengal. 181S. 



gra'cilis (slender). April. N.S.Wales. 1/94, 



Biennial. 



litora'lis (sea-shore). April. Van Diemen's 



Land. 1820. Biennial. 



HARDY PERENNIALS. 

 W. Arva'tica (Arvatian). May. Spain. 1825. 



capilla'cea (hair-like-Jeaued). White. May. 



Cape of Good Hope. 1822. 



grandiflo'ra (large-flowered). I.July. Siberia. 



1/82. 



Kitaibe'lii (Kitaibel's). Violet. June. Hungary. 



1823. 



re'pens (creeping). . White. July. 1830. 



HARDY ANNUALS. 

 W. Capensis (Cape). July. 1819- 



diffu'sa (spreading). June. Cape of Good 



Hope. 1787. 



diversifo'lia (various-leaved). July. Cape of 



Good Hope. 1822. 



fie'xilis (bending). May. Cape of Good Hope. 

 1836. 



hispi'dula (bristlv). Blue, white. June. Cape 



of Good Hope. 1816. 



ttnea'm (narrow -leaved). White, July. Cape of 



Good Hope. 1822. 



Lolelioi'des (Lobelia-like). r Palered. July. Ma- 



deira. 1777- 



nutabu'nda (much-drooping). White. July. 



Calabria. 1830. 



procu'mbens (lying-down). July. Cape of 



Good Hope. 1824, 



WALDSTEI'NIA. (Named after F. von 

 Waldstein, a German botanist. Nat. ord., 

 Roseworts [Rosacese]. Linn., 12-Jco- 

 sandria \-Monogynia. Allied to Geum.) 



Hardy herbaceous perennial. For culture, see 

 GK'UM. 



W. geoi'des (avens-like). f. Yellow. June. Hun- 

 gary, 1804. 



WALKE'RA. (Named after Dr. E. 

 Walker, founder of the Cambridge Bo- 

 52 



tanic Garden. Nat. ord., Ochnads [Och- 

 nacese]. Linn., b-Pentandria 1-Mono- 

 gynia.) 



Stove, yellow-flowered evergreens. Cuttings of 

 half-ripened shoots, or firm side-shoots, in sand, 

 under a bell-glass, in the beginning of April* 

 sandy loam and peat. Winter temp., 50 to 60 ; 

 summer, 60 to 85. 



W. integrifo'lia (entire-leaved). 12. Guiana. 

 serra'ta (saw-leaved). 12. Malabar. 1824. 



WALKS. See CONCRETE and GEAYEL 

 WALKS. 



WALL-CRESS. A'ralis. 



WALLFLOWER. Cheira'nthus. 



WALLI'CHIA. (In honour of Dr. Wai- 

 lich, curator of the Calcutta Botanic 

 Garden. Nat. ord., Palms [Palmaceae]. 

 Linn., 21-Moncecia 6-Hexandria.) 



Moist-stove Palm. Requires a light, well- 

 drained loam. Increased by suckers, which must 

 be separated gradually, so as to induce them to 

 root before being finally taken from the parent. 

 W. densiflo'ra (thickly-flowered). Sikkim Him- 

 maiaya. This is the same as W, oblongi- 

 fo'lia. 



WALLS are usually built in panels, 

 from fifteen to thirty feet in length, one 

 brick thick, with pillars at these specified 

 distances, for the sake of adding to their 

 strength, and the foundation a brick and 

 a half thick. The plan of Mr. Silver- 

 lock, of Chichester, is worthy of adoption, 

 since, if well constructed, it is equally 

 durable, and saves one-third of the ex- 

 pense. Walls so constructed are stated 

 to become dry after rain much more 

 rapidly than a solid wall of the same or 

 any other thickness, and there appears 

 not a shadow of a reason why they should 

 not ripen fruit equally well. He forms 

 the wall hollow, nine inches in breadth, 

 by placing the bricks edgewise, so as to 

 form two facings ; they are laid in good 

 mortar, and the joints carefully finished. 

 They are placed alternately with their 

 faces and ends to the outsides, so that 

 every second brick is a tie, and in each 

 succeeding course a brick with its end 

 outwards is placed on the centre of one 

 laid lengthwise on either side. The top 

 of the wall must be covered with a coping 

 of stone or bricks projecting eight inches. 

 It is strengthened at every twenty feet by 

 piers of fourteen-inch work, built in the 

 same manner, with bricks laid on edge. 



In every instance a wall should never 

 be lower than eight feet. The thickness 

 usually varies with the height of the wall, 

 being nine inches if it is not higher than 

 eight feet; thirteen and a half inches, if 

 above eight and under fourteen feet j and 



