Siphonogam 



Smnt 



marriage), plants fertilized by means 

 of pollen-tubes ; all Phanerogams ; 

 adj. siplionogam'ic, siphonog'amtous, 

 the condition being Siphonog'amy ; 

 siphoiioste'lic {<Tri\\-n, a column), 

 having a tubular stele (Jeffrey) ; Si'- 

 phonostele (4- Stele), the central 

 vascular cylinder when complete as 

 a tube. 



Biraplank'ton (+ Plankton), floating 

 marine vegetation mainly composed 

 of Thalassosira. 



sirosrplioid (elSoj, resemblance), like 

 the genus Sirosiphcni, in which the 

 cells occur in two or more rows; 

 sirosiphona' ceous, allied to Sirosi- 

 phon (Archer). 



Sis'ter-cellB, cells of the same genera- 

 tion produced by the division of a 

 single (mother) cell, as the pollen- 

 grains of a tetrad. 



Sit'uB (Lat, situate), (1) the position 

 occupied by an organ ; (2) J the 

 mycelium of some Fungi (Lindley). 



Skaphoplank'ton {<TK<i<pv, a skiff, + 

 Plankton), boat-shaped organisms 

 floating as a mass (Forel). 



Skein, a condition of t(*e cliromatin of 

 the nucleus in the initial and final 

 stages of division ; daugh'ter '^ or 

 moth'er ~, according to their de- 

 velopment. 



Skereton (o-KeXeTij, mummy), any 

 framework which persists after the 

 destruction of the organ by fire or 

 corrosion, as the remainder of the 

 cell-wall in ash, or the starch grain 

 after partial solution by an enzyme. 



Skin, a thin external covering, the 

 cuticle or epidermis. 



Ski'ophyte {a-Kih, shade ; <pvrhv, a 

 plant), a plant which is not adapted 

 to full exposure, but prefers shade. 



Skoliotrop'ic (<r/coAii»j, bent ; rpoir^, a 

 turning), curved, cf. campylotuo- 



POUS. 



ikotpph'iions {(TkStos, darkness ;<^iA€a>, 

 I love), = GE0PHIL0U8 ; Skotot'rop- 

 Um {rpoTT^, a turning), seeking dark- 

 ness ; apheliotropic. 



Slacks, pi., Yorkshire name for shallow 

 valleys, due to glacier lakes in the 

 Ice-age. 



slashed, laciniate. 



slate-grey, the colour of slate, 

 schistaceous. 



Sleasi, the smut of oats due to Ustilago 

 Avenae. 



Sleep, the repose of plants, with 

 changes in position of organs such 

 as leaves, due to absence of light ; 

 '^ Move'ments, positions taken by 

 leaves during the night, nyctitropic 

 movements. 



Slee'ping (or Slee'py) disease of 

 Tomato plants, the result of Fusa- 

 Hum Lycopersici. 



slen'der, long and thin. 



Sli'ding Growth, a gradual change in 

 the relative position of vessels, 

 fibres, etc., due to their develop- 

 ment in a lojagitudinal direction. 



Slime-flux, a flow of liquid from 

 diseased fruit and forest trees, due 

 to the attacks of various Fungi, 

 producing a fermentation of the 

 cortical elements down to the cam- 

 bium zone (Massee) ; '^ Fun'gi = 

 Myxogastres ; '- Moulds, a popu- 

 lar term for Myxogastres, other- 

 wise called Myxomycetes and Myce- 

 tozoa ; '- Strings, metabolized mate- 

 rial in a state of flux, which passes 

 by the pores of the sieve -plates from 

 one -sieve-tube to another (A. W. 

 Hill). 



sli'my, mucous. 



Sling-fruit, applied to any fruit which 

 by possessing contractile tissue pro- 

 jects its seeds to a distance. 



Slip, (1) described by Loudon as a 

 shoot from the collar or lower part 

 of - the stem of a plant, used for 

 propagation, stem-suckers; (2) a 

 popular name for Cutting, but not 

 used by cultivators. 



smarag'dine, suiarag'dinics {fffidpayios, 

 an emerald), emerald green. 



Smilacine, a crystalline body occur- 

 ring in the roots of the officinal 

 sarsaparilla, Smilax. 



smo'ky, smoke-coloured, fumosus. 



smooth, (1) not rough, opposed to 

 scabrous, free from hairs ; (2) gla- 

 brous, as opposed to pubescent. 



Smut, disease in grain produced by 



348 



