Glossary. 423 



Sex : pertaining to a differentiation into male and female. 

 Sex'ual-genera'tion : the stage or generation in the life cycle which bears 



the eggs and sperms, as the prothallus of ferns. Figs. 157, 158, and 159. 

 Sheath : a tubular covering, such as the lower part of the leaves of grasses. 

 Sheathing : inclosing after the manner of a sheath. 

 Shoot : the ascending axis or branch therefrom with its leaves. 

 Shrub : a woody plant smaller than a tree. Shrubby : resembling a shrub. 

 Sil'icle (L. silicula, a httle husk or pod) : a short pod scarcely longer than 



broad. Fig. 310. 

 Silique', pr. si-leek' (L. siliqua, a husk or pod) : an elongated pod divided 



by a partition and opening by two sutures, as in the Cruciferse. Pig. 309. 

 Silky : beset with a soft and straight pubescence. 

 Simple: undivided; applied to pistils and fruits consisting of a single 



carpel. 

 Sin'uate or sin'uous (L. sinuosus, full of windings or curves) : having a 



strongly wavy margin. Fig. 232. 

 Si'nus (L. sinus, a curve, hollow, or fold) : the recess between two lobes. 

 So'rus, pi. sori (Gr. soros, a heap) : a fruit dot, or cluster of sporangia in 



ferns. 

 Spadi'ceous (Gr. spadix, a palm branch) : resembling or bearing a spadix. 

 Spa'dix : a spike with a fleshy axis, as in calla lily and Jack-in-the-pulpit. 



Fig. 346. 

 Spathe, pr. spath (Gr. spathe, a spatula) : a large bract or pair of bracts in- 

 closing a flower or inflorescence. Fig. 346. 

 Spat'ulate (L. spatula, a broad piece, or a palm branch) : narrowing toward 



the base from a rounded summit. Fig. 228. 

 Sperm CGr. sperma, a seed) : the male reproductive cell. 

 Sperm'atophyte (Gr. sperma, spermatos, a seed ; phyton, a plant) : a plant 



bearing true seeds with differentiated embryos. 

 Spi'cate (L. spica, an ear of grain, as of corn or wheat) : borne in or re- 

 sembling a spike. 

 Spike : an inflorescence having the flowers nearly or quite sessile upon an 



elongated axis. Fig. 82, j. Spike 'let: a small or secondary spike. 

 Spin'dle-shaped : see Fusiform. 



Spine (L. spina, a thorn) : a sharp woody outgrowth from a stem. 

 Spi'nose or spi'nous : beset with spines. 

 Spi'nulose : beset with small spines. 

 Sporan'gium (Gr. spora, a seed; aggefon, a vessel) : a sac containing spores. 



Fig. 154. 

 Spore : a reproductive cell of Cryptogams capable of growing into a mature 



plant. 



