Shot 



•ilky 



a *' salt spot" ; Shot-hole, an attack 

 on plum trees and their allies, due to 

 to the fungus Cercosporacircumscissa, 

 small holes being formed in the 

 leaves. 



Shoulder, in Lagenostoma that part 

 which curves inwards towards the 

 apex of the seed. 



Shrub, a woody perennial of smaller 

 structure than a tree, wanting the 

 bole ; ^ Lay'er, chiefly formed of 

 hazel, with sallow and dogwood ; 

 <- Stra'tam, in mixed woodland 

 from about 3 to 15 feet in height ; 

 -' Wood, when shrubs form the chief 

 feature ; shrub'by, like a shrub ; 

 Shrub'let, an undershrub. 



Sibling (Sib, bird fanciers' term for 

 in-bred), applied to a pair of plants 

 from the ovaiies or the pollen of 

 the same plant (Pearson); SiVship, 

 the relationship in question. 



Siccideser'ta, pi. {siccus, dry, + de- 

 sertum, a desert), steppe formations ; 

 SiccisBimideser'ta, pL, deserts on 

 which less than half of the substra- 

 tum is covered with vegetation ; 

 sic'cus (Lat. ), dry, juiceless, con- 

 taining little or no watery juice; 

 siocita'te (Lat., abl. absol.), in the 

 dry state, that is, herbarium speci- 

 mens 



Sio'kle, = Drepanium (Potter). 



Sickle-stage, of nuclear division, 

 Zimmerman's term for the Para- 

 nucleus of Strasburger, a crescent- 

 shaped body at one margin of the 

 nucleus, supposed to represent a 

 stage in the disappearance of the 

 nucleolus. 



Sieye-oells, the individual cells which 

 constitute the Sieve Tubes ; "--Disk, 

 <-- Field, '^ Plate, the pierced plate 

 on the transverse or lateral walls 

 of vessels covered on both sides by 

 callus ; -^ Pores, the openings in a 

 sieveplate; ~ Tis'sue, long articu- 

 lated tubes, whose segments com- 

 municate by means of the sieve- 

 plates; '^ Tubes, the tubes compos- 

 ing the tissue described ; -^ Xy'lem, 

 applied by Chodat to groups of sieve- 

 cells in the wood of Dicella. 



Sieverse'tum, a plant association in 

 which Sievcrsia is the predominant 

 factor (Clements). 

 sigilla'rian, resembling or allied to 

 Sigillaria, a genus of fossil plants 

 whose surface is marked with numer- 

 ous scars ; sig'illate, sigilla'tus (Lat., 

 sealed), as if marked with impres- 

 sions of a seal, as the rhizome of 

 Polygonatutn. 

 sig'matoid {alyixa, the Greek $ ; ciSos, 

 resemblance), or sig^moid, sigmoi'- 

 deus, doubly curved in opposite 

 directions, like the Greek s. 

 Signs, arbitrary symbols for shortly 

 stating certain facts ; a selection of 

 those more generally used, is given 

 in Appendix A. 

 Silene'tum, an association of Silene 



(Clements). 

 silic'eous(si7ea:;, Si7{cw,a flint), pertaining 

 to silica.as ^ -grasslands, or silic'icole, 

 showing a preference for siliceous 

 soils ; silicio'olous, colo, I inhabit), 

 used of Lichens which grow on flints; 

 Siliciflca'tion, the deposition of silica 

 in tissues ; Silic'ion, denoting the 

 prevalence of silica in the soil ; 

 Sirico-ceriulose(-f Cellulose), the 

 condition of tissue when si! ex is 

 intimately blended with it is as in 

 Equisetuvi hyemale, Linn. (Tschiich). 

 Sillcle, Silic'ula, Sil'icule (Lat., a 

 little husk or pod), (1) a short 

 siliqua, not nmch longer than wide ; 

 (2) I = Carpoclonium of Algae; 

 silic'ulose, having silicles as fruits, 

 or resembling a silicle. 

 Sil'iqua (Lat.), Silique' (pr. Si-leek'), 

 (1) the peculiar pod of the Cruciferae, 

 two valves falling away from a frame, 

 the Replum, on which the seeds 

 grow, and across which a false parti- 

 tion is formed ; (2) J by Blair em- 

 ployed for Legume ; Siliqueria, a 

 subordinate part of 'a fruit such as 

 the poppy, consisting of a carpel 

 with two extended ]>lacentas ; sili- 

 q'uiform {forma, shape), shaped 

 like a silique ; siriquose, siliqiio'sus, 

 when the fruit is a silique, or resem- 

 bles one. 

 sil'ky, sericeous. 



346 



