mtw, 



Siplionogam 



Sil'va = Sylva. 



Sirver-grain, the appearance in radial 

 longitudinal section of exogenous 

 wood, especially of oak, due to 

 shining plates of the medullary rays; 

 -^ -leaf, a disease of plum-leaves, 

 ascribed to Sterevm purpureum. 



sil'very, having a lustre like silver. 



sim'ilary Parts t, elementary organs or 

 tissues (Lindley). 



similiflo'rous [similis, like ; flos, fioris, 

 a flower), applied to an umbel when 

 its flowers are all alike ; Simili- 

 sym'metry (+ Symmetry), when the 

 two halves of a Diatom valve are 

 similar (Schuett) ; consimilarity. 



sim'ple, sim'plex, of one piece or series, 

 opposed to comjiound ; ~ Fruits, 

 those which result from the ripening 

 of a single pistil ; -' Gland, a single 

 cell containing a special secretion ; 

 -^ Gonid'iophore ( -f Gonidiophore), 

 a single hypha as in rencillium; 

 '^ Hairs, not compound or branched, 

 the prolongation of a single epi- 

 dermal cell ; ~ Inflores'cence, a 

 flower cluster with one axis, as a 

 spike, spadix, or catkin ; --' Leaf, of 

 one blade, with incomplete segmen- 

 tation ; '^ Nuta'tion, nutation in one 

 direction only ; -- Pis'til, consisting 

 of one carpel ; '- Pit, -^ Pore, with 

 only a slight enlargement at the 

 centre, where it meets the neigh- 

 bouring cell ; '^ pri'mary Root, a 

 tap-root ; ~ Spor'ophore, a single 

 hypha or its bianch ; in German, 

 Fruchtfaden ; -- Stem, a stem which 

 is unbranched. 



simplicis'simus (Lat.), entirely simple. 



simulta'neous [siimdtaneus, Late Lat., 

 at the same time) Whorls, when 

 the members are of the same age 

 and developed at the same time. 



Sina'grin, or Sin'igrin, a glucoside 

 occurring in the seeds of Brassica 

 sinapoides, Roth, formerly termed 

 Sinapis nigra, Linn., the origin of 

 the name. 



Sinarbin, mustard oil from Brassica 

 alba, Boiss., formerly termed 

 Sinapis alba, Liun., whence the 

 name. 



Sina'pin or Sina'pisin, an alkaloid 

 from Brassica alba, Boiss. (Han- 

 bury and Fliickiger^i, 



sin'gle, used of a flower which has 

 only one set of petals, as opposed to 

 double or any approach to doubling. 



Sing'uliform {singiclvs, separate, + 

 Form), a plant in which one organ 

 varies independently of another 

 (Kuntze). 



sinis'trad = sinistral. 



sinis'tral, sinis'trorse, sinistror'sit-fy 

 turned to the left ; cf. dextrorse, 

 and Appendix C. 



Sin'istrin {sinister, the left), a carbo- 

 hydrate from Urginea and other 

 bulbs, formerly regarded as a gum ; 

 Sinistrosty'ly (+ Style) in enantio- 

 stylous flowers when the styles are 

 bent to the left (Knuth). 



Sin'ker, (1) the secondary roots of 

 Mistletoe, Viscum album, Linn., 

 forming laterals which strike per- 

 pendicularly downward into the 

 wood of the host ; (2) similar 

 growths in Pilostyles Ulei (Solms). 



sin'uate, sinna'tus (Lat., curved), with 

 a deep wavy margin; sin'aated, 

 deeply waved ; sin'uolate, sinuola'- 

 tus, repand, faintly or minutely sin'- 

 uate; sin'uose, sin'uous, sinuate. 



Sin 'us (Lat., a curve, a fold), (1) a 

 recess or re-entering angle ; (2) a 

 pore in some Fungi (Lindley) ; (3) 

 the recess between the half-cells of 

 Desmidiae ; (4) in Lagenostoma the 

 space between the free portion and 

 the nucellus and the integument al 

 lining ; (5) in the same genus, the 

 gaps in a fimbriated micropyle 

 (Oliver). 



Siot'ropism (ce/w, I shake ; rpoir^, a 

 turning), stimulus by shaking, as 

 with Mimosa pudica Linn. 



Si'phon {ai<pov, a tube), a pericentral 

 elongated tube in the frond of Poly- 

 siphonia and allied Algae ; sipho'- 

 neous, relating to Algae, possessing 

 tubular structure ; sipho'nic, tubu- 

 lar, as applied to a Dictyo.stele ; 

 Siphoniphy'ton {'(pvrhu, a plant), a 

 Composite with all its florets 

 tubular ; Si'phonogani {ydp.os, 



347 



