Sievekingia 



(337) 



Silphium 



SIEVEKINGIA. 



Of the four species of this obscure genus of 

 Orchids (iird. Orchidacese). one only, reichen- 

 bacliiiina, yellow and red, has been introucded, 

 and even it is not in general cultivation. Culture 

 as for Acineta. 



SIEVES. 



Several sizes of mesh are needed. Thus J", \", A ', 

 j", and 1" meshes would make up a complete set! 

 The mesh is of tough, closely interwoven wire ; the 

 surrounding band of wood. Sieves are too often 

 employed for sifting potting soil. Fine soil is 

 needed for sowing small seeds, but ordinary plants 

 require soil chopped up with the spade, or pulled 

 to pieces by hand, all the fibre being retained. 

 The |" size is handy for sifting cinders, and it 

 will be much more easy to work it if it be mounted 

 upon a stout Y shaped handle For screening coal 

 and gravel, .screens are used in which the bars 

 only run one way, there is, strictly speaking.no 

 mesh. Specially made sieves of various sizes are 

 employed by seedsmen for cleaning various seeds. 



SIGMATOSTALIX. 



A small and obscure genus of dwarf, stove 

 Orchids (-rid. Orchidacese) They answer to the 

 same Attentions as the warmth -loving Oncidiums. 



Principal Species 

 malleifera, yi'l., spotted radiuans, yellowish grn., 



or - vio. pur. 



SILENE. (CATCHFLY.) 



An extensive genus of hardy or greenhouse 

 biennial or perennial herbs (ord. Caryophyllese). 

 A considerable number are valuable for garden 

 decoration in beds or borders, and among the 

 Alpines are some capital rockwork plants. Pen- 

 iltila and its forms are desirable annuals for spring 

 or summer They are generally of easy cultiva- 

 tion, and of effective colours. Many of the species 

 have a viseid sap on the stems, which gives rise 

 to the popular name of Catchfly, from the insects 

 which are trapped by it. Propagation, the annuals 

 and biennials by seeds, sown in spring under glass 

 or in the open in summer; the perennials bv 

 division in spring or in autumn. Sow pendula in 

 August for spring bloom. Soil, light and loamy, 

 with sonic sand and grit for the Alpines. 



Principal Species and Varieties : 



[NOTE Hardy perennials unless otherwise 

 amrked] 



Other Species and Varieties : 



segyptiaca, 6" to 12", Je., italica, H'. My., bien., wh. 



hdy. aun., pk. (syn. juncea, f' to 2', Je., aim. 



Atociou). pk. ( X yn. picta). 



Armeria, 1' to 1^', Jy., laciniata, 3', Je., hlf-hdy. 



hdy. ami., pk. Sweet per., crim. 



William Catchfly. maritima, Je., trailer, wh. 



alba, wh. _ rosea, ro. 



chloruefolia, 1' to 2', Aug., noctiflora, 1', Jy., ann., 



wh - ro., yel., fragrant, 



cihata. !)", Je.. per., wh. ; nutans, 2' to 3', Je., wh. 



var. Grsefferi. (,,. paradoxa of 



colorata, .1', Je., ann., ro. Lapeyrouse). 



(/. vespertina of But- ornata, 2', My., grh. 



anieal ifagamu 677). bien., pur. 



compacta, 1J', Jy., bien., paradoxa, 1', Jy., pk. 



P k - Pumilio, 1", Je., pk. 



cretica, 9", Jy., bien., alba, wh. 



gru., wh. quadrifida, 6", My., wh. 



Cucubalus, 2' to 3', Je., regia, 3' to 4', Jy., sc. 



wh. (syn. inflate). Blail- Sapouaria (see Saponaria 



der Campion, Cow Ball. officinalis). 



Bmbriata, 2' to 4', My., Saxifraga, ;i" to 6",Je., 



"'*' yel. (syn. petrsea of 



Fortunei, 1', sum., pk. or Waldst. and Kit.) 



wn - sericea, 9", Jy., ami., pk. 



galhca, 1' to 2', Je., aim., stylosa, 6", Jy., yel. 



pk. or wh. supina, Je., wh. 



- angliea, wh. (KIJII. tatarica, 2', Jy., wh. 



augliea). tenuis, 1', Je., pur. (nun. 



Hookeri, My., trailing tenuifolia). 



per., pale pk. vallesia, 6", Jy., pale pk. 



SILPHA. 



A genus of beetles sometimes destructive of 

 Beetroots. The larvae feed on carrion. Dressing 

 affected plants with soot or lime when damp, and 

 using manure free from offal, are the best remedies. 



SILPHIUM. (COMPASS PLANT, RESIN 



PLANT.) 



Coarse-growing hardy perennial plants (ord. 

 Composite). They produce a resinous juice, but 

 are best known because of the reputed property 

 of one of the species (laciniatnm) of turning its 

 leaves always north and south. Propagation, by 

 division or seeds Common soil. 



Principal Species : 

 laciniatum, 3' to "', Jy., perfoliatum, 4' to 9 , Jy.. 



yel. Compass Plant, yel. 



Pilot Plant, Polar connatum, yel. 



Weed. 



Other Species : 



albiflorum, 2' to 4', Sep., terebinthinaceum 4' to 



yel- 10', Jy., yel. Prairie 



Aeteriscus, 2' to 4', Je., Dock. 



y 6 '- trifnliatum, 4' to 6', Aug., 



iniegrifolium, 4' to 6', yel. 



Jy., yel. 



Silk I'nttioi Tree (.-.vr Hiinifiax and Eriodendron). 



til/ten >V.w/ ( W r A.-i-li'/iinx). 



Silk Tnr {KIT A/hi:;in .hilthriffin). 



Sill; \inr (an' Periploea grace-). 



Sill.-ii On It (,r (in-rillni 



Silrer Iti'II Tnr (/ llnl 



Siln-r llrrri/ (fie l-'Jii-iiiin . 



Siln-r It mi-is ( ('oh/lull.,, PaeSyjffrvta). 



Sihvr Ilimli (m- Anllii/llig Btia-ba-Sons). 



Siln-r Ceiliir (xi-r .///'/;* firt/iitimiH ijlauca). 



Siln-r Fir (see Alii*'* /1,-,-liniiln }. 



Stiver I.I-H fiif I'mrl, ( /',,// Hi.-,, use*). 



Sili-rr Hod.(tfe Axfiliiiili-lim riiiiinsiis). 



-r Tree (m-i- l.i iii-nili'iiilivii n riji nit inn and 



ll'i-ed (.I'dti'ulillii I /, r'nin). 



